what is citation style in research

How to Format a Citation

Examples of apa, mla, and chicago manual of style, citation styles: american psychological association (apa), citation styles: chicago, citation styles: modern language association (mla), example: direct quote cited in a book, example: reference within a journal article.

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There are two basic approaches to citation:

• In-text citations + a list of references at the end of the paper
• Endnotes or footnotes +/- a bibliography at the end of the paper

Scholars writing in the sciences and social sciences typically use in-text citations, while humanities scholars utilize endnotes/footnotes.

While the two basic approaches to citations are simple, there are many different citation styles.

What is a citation style?

The way that citations appear (format) depends on the citation style, which is a set of established rules and conventions for documenting sources.

Citation styles can be defined by an association, such as the Modern Language Association (MLA), publisher, such as the University of Chicago Press, or journal, such as The New England Journal of Medicine .

What citation style should I use?

The citation style that you use depends on the discipline in which you are writing, and where, or by whom, your work will be published or read.

When in doubt, ask your professor if there is a particular style that he/she would like you to use. 

Where can I find more information on how to cite a specific type of source in a particular style?

The library has style manuals in print and online for several commonly used styles such as American Psychological Association (APA), Modern Language Association (MLA) and Chicago.  In addition, there are several excellent citation style guides on the web. (See below)

For examples of APA and MLA and Chicago Manual of Style, visit Purdue's OWL (Online Writing Lab) site.

Frank, H. (2011). Wolves, Dogs, Rearing and Reinforcement: Complex Interactions Underlying Species Differences in Training and Problem-Solving Performance.  Behavior Genetics ,  41 (6), 830-839. 

• Publication Manual of the American Psychological Association Print manual for the APA style, available in the Sciences and Rockefeller libraries.
• Purdue University Online Writing Lab Well-organized, easy-to-follow guide, with numerous examples.
• APA Style American Psychological Association website for the APA Style. Provides tutorials, answers to frequently asked questions, and more.

Frank, H. 2011. "Wolves, Dogs, Rearing and Reinforcement: Complex Interactions Underlying Species Differences in Training and Problem-Solving Performance."   Behavior Genetics  41 (6):830-839. 

• The Chicago Manual of Style Older (15th edition) print manual, available at the Sciences, Rockefeller and Orwig libraries.
• The Chicago Manual of Style Online Current (16th) edition of the Chicago Manual of Style, and answers to frequently asked questions. Off-campus use requires Brown username and password.

Frank, H. "Wolves, Dogs, Rearing and Reinforcement: Complex Interactions Underlying Species Differences in Training and Problem-Solving Performance."  Behavior Genetics  41.6 (2011): 830-39. Print.

• MLA Style Manual and Guide to Scholarly Publishing Print manual for the MLA style. Available in the Rockefeller Library.
• MLA Handbook for Writers of Research Papers Print handbook for the MLA. Available in the Rockefeller Library.

Source: Gabriel, R. A. (2001). Gods of Our Fathers: The Memory of Egypt in Judaism & Christianity . Westport, CT, USA: Greenwood Press.

Source: Bradt, J., Potvin, N., Kesslick, A., Shim, M., Radl, D., Schriver, E., … Komarnicky-Kocher, L. T. (2015). The impact of music therapy versus music medicine on psychological outcomes and pain in cancer patients: a mixed methods study. Supportive Care in Cancer : Official Journal of the Multinational Association of Supportive Care in Cancer , 23 (5), 1261–71.

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• Last Updated: Oct 24, 2023 9:54 AM
• URL: https://libguides.brown.edu/citations

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Citation Styles

• Citation Basics

What is a Citation?

A citation is the basic information required to identify and locate a specific source, e.g. book, book chapter, article, website, video, etc.

What is a Citation Style?

Different academic disciplines have specific guidelines for organizing material and citing sources. These rules are published as style manuals . While each citation system is distinct, the underlying rationale is the same–to facilitate written communication among members in a scholarly community.

Parts of a Citation *

• Book: Author Name . Title . Publisher, Year. 

Example: Macfarlane, Bruce. Researching with Integrity: The Ethics of Academic Enquiry . Routledge, 2009. 

• Book Chapter: Author Name. “Chapter Title.” Book Title. Editor, Publisher, Year, Chapter Page Numbers.

Example: Tan, Amy. “Yes and No.” The Genius of Language: Fifteen Writers Reflect on Their Mother Tongues, edited by Wendy Lesser, Pantheon Books, 2004, pp. 25-34.

• Journal Article: Author Name . “Article Title.” Journal Title, Volume Number, Issue Number , Year, Article Page Numbers.

Example: Hess, Mickey. “Was Foucault A Plagiarist? Hip-Hop Sampling And Academic Citation.” Computers & Composition, vol. 23, no. 3, 2006, pp. 280-295.

• Website: Author Name. “Title of Page/Work.” Title of Website, Date of Publication, Location.

Example: Calonia, Jennifer. “How to Avoid Plagiarism.” Grammerly Blog, 21 Aug 2019, https://www.grammarly.com/blog/5-most-effective-methods-for-avoiding-plagiarism .

*The order and punctuation of the citation components are dictated by the style you use (above are formatted in MLA).

What is a DOI?

Digital Object Identifiers (DOIs) are unique identifiers that may be assigned to published articles and other works. Their purpose is ensure persistent access to online content. If a DOI is available, you should include it in your citation.

APA: Clark, D. A., & Murphy, W. (2021). The efficacy of a classroom game for teaching APA style citation. Teaching of Psychology , 48 (3), 209–214. https://doi.org/10.1177/0098628320977263

MLA: Clark, Daniel A., and Walter Murphy. “The Efficacy of a Classroom Game for Teaching APA Style Citation.” Teaching of Psychology , vol. 48, no. 3, July 2021, pp. 209–14. Sage Journals , https://doi.org/10.1177/0098628320977263.

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• Chicago/Turabian
• Additional Styles
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• Last Updated: Aug 16, 2022 11:15 AM
• URL: https://guides.library.ucdavis.edu/citation-styles

• Directories
• What are citations and why should I use them?
• When should I use a citation?
• Why are there so many citation styles?

Which citation style should I use?

• Chicago Notes Style
• Chicago Author-Date Style
• AMA Style (medicine)
• Bluebook (law)
• Additional Citation Styles
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• Citing Sources

Citing Sources: Which citation style should I use?

The citation style you choose will largely be dictated by the discipline in which you're writing. For many assignments your instructor will suggest or require a certain style. If you're not sure which one to use, it's always best to check with your instructor or, if you are submitting a manuscript, the publisher to see if they require a certain style. In many cases, you may not be required to use any particular style as long as you pick one and use it consistently. If you have some flexibility, use the guide below to help you decide.

Disciplinary Citation Styles

• Social Sciences
• Sciences & Medicine
• Engineering

When in doubt, try: Chicago Notes

• Architecture & Landscape Architecture → try Chicago Notes or Chicago Author-Date
• Art → try Chicago Notes
• Art History → use  Chicago Notes
• Dance → try Chicago Notes or MLA
• Drama → try Chicago Notes or MLA
• Ethnomusicology → try Chicago Notes
• Music → try Chicago Notes
• Music History → use  Chicago Notes
• Urban Design & Planning → try Chicago Notes or Chicago Author-Date

When in doubt, try: MLA

• Cinema Studies → try MLA
• Classics → try Chicago Notes
• English → use  MLA
• History → use   Chicago Notes
• Linguistics → try MLA
• Languages → try MLA
• Literatures → use  MLA
• Philosophy → try MLA
• Religion → try Chicago Notes

When in doubt, try: APA or Chicago Notes

• Anthropology → try Chicago Author-Date
• Business → try APA (see also Citing Business Information from Foster Library)
• Communication → try APA
• Criminology & Criminal Justice → try Chicago Author-Date
• Economics → try APA
• Education → try APA
• Geography → try APA
• Government & Law (for non-law students) → try Chicago Notes
• History → try Chicago Notes
• Informatics → try APA
• Law (for law students) → use Bluebook
• Library & Information Science → try APA
• Museology → try Chicago Notes
• Political Science → try Chicago Notes
• Psychology → use  APA
• Social Work → try APA
• Sociology → use  ASA or Chicago Author-Date

When in doubt, try: CSE Name-Year or CSE Citation-Sequence

• Aquatic & Fisheries Sciences → try CSE Name-Year or APA
• Astronomy → try AIP or CSE Citation-Sequence
• Biology & Life Sciences → try CSE Name-Year or APA
• Chemistry → try ACS
• Earth & Space Sciences → try CSE Name-Year or APA
• Environmental Sciences → try CSE Name-Year or APA
• Forest Sciences → try CSE Name-Year or APA
• Health Sciences: Public Health, Medicine, & Nursing → use AMA or NLM
• Marine Sciences → try CSE Name-Year or APA
• Mathematics → try AMS or CSE Citation-Sequence
• Oceanography → try CSE Name-Year or APA
• Physics → try AIP or CSE Citation-Sequence
• Psychology  → use  APA

When in doubt, try: CSE Name-Year or IEEE

• Aeronautics and Astronautics → try CSE Citation-Sequence
• Bioengineering → try AMA or NLM
• Chemical Engineering → try ACS
• Civil and Environmental Engineering → try CSE Name-Year
• Computational Linguistics → try CSE Citation-Sequence
• Computer Science & Engineering → try IEEE
• Electrical and Computer Engineering → try IEEE
• Engineering (general) → try IEEE or CSE Name-Year
• Human Centered Design & Engineering → try IEEE
• Human-Computer Interaction + Design → try IEEE
• Industrial and Systems Engineering → try CSE Name-Yea r
• Mechanical Engineering → try Chicago Notes or Chicago Author-Date

See also: Additional Citation Styles , for styles used by specific engineering associations.

Pro Tip: Citation Tools Save Time & Stress!

If you’re enrolled in classes that each require a different citation style, it can get confusing really fast! The tools on the Quick Citation Generators section can help you format citations quickly in many different styles.

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• Last Updated: May 1, 2024 12:48 PM
• URL: https://guides.lib.uw.edu/research/citations

Citing sources: Overview

• Citation style guides

Manage your references

Use these tools to help you organize and cite your references:

• Citation Management and Writing Tools

If you have questions after consulting this guide about how to cite, please contact your advisor/professor or the writing and communication center .

Why citing is important

It's important to cite sources you used in your research for several reasons:

• To show your reader you've done proper research by listing sources you used to get your information
• To be a responsible scholar by giving credit to other researchers and acknowledging their ideas
• To avoid plagiarism by quoting words and ideas used by other authors
• To allow your reader to track down the sources you used by citing them accurately in your paper by way of footnotes, a bibliography or reference list

About citations

Citing a source means that you show, within the body of your text, that you took words, ideas, figures, images, etc. from another place.

Citations are a short way to uniquely identify a published work (e.g. book, article, chapter, web site).  They are found in bibliographies and reference lists and are also collected in article and book databases.

Citations consist of standard elements, and contain all the information necessary to identify and track down publications, including:

• author name(s)
• titles of books, articles, and journals
• date of publication
• page numbers
• volume and issue numbers (for articles)

Citations may look different, depending on what is being cited and which style was used to create them. Choose an appropriate style guide for your needs.  Here is an example of an article citation using four different citation styles.  Notice the common elements as mentioned above:

Author - R. Langer

Article Title - New Methods of Drug Delivery

Source Title - Science

Volume and issue - Vol 249, issue 4976

Publication Date - 1990

Page numbers - 1527-1533

American Chemical Society (ACS) style:

Langer, R. New Methods of Drug Delivery. Science 1990 , 249 , 1527-1533.

IEEE Style:

R. Langer, " New Methods of Drug Delivery," Science , vol. 249 , pp. 1527-1533 , SEP 28, 1990 .

American Psychological Association   (APA) style:

Langer, R. (1990) . New methods of drug delivery. Science , 249 (4976), 1527-1533.

Modern Language Association (MLA) style:

Langer, R. " New Methods of Drug Delivery." Science 249.4976 (1990) : 1527-33.

What to cite

You must cite:

• Facts, figures, ideas, or other information that is not common knowledge

Publications that must be cited include:  books, book chapters, articles, web pages, theses, etc.

Another person's exact words should be quoted and cited to show proper credit 

When in doubt, be safe and cite your source!

Avoiding plagiarism

Plagiarism occurs when you borrow another's words (or ideas) and do not acknowledge that you have done so. In this culture, we consider our words and ideas intellectual property; like a car or any other possession, we believe our words belong to us and cannot be used without our permission.

Plagiarism is a very serious offense. If it is found that you have plagiarized -- deliberately or inadvertently -- you may face serious consequences. In some instances, plagiarism has meant that students have had to leave the institutions where they were studying.

The best way to avoid plagiarism is to cite your sources - both within the body of your paper and in a bibliography of sources you used at the end of your paper.

Some useful links about plagiarism:

• MIT Academic Integrity Overview on citing sources and avoiding plagiarism at MIT.
• Avoiding Plagiarism From the MIT Writing and Communication Center.
• Plagiarism: What It is and How to Recognize and Avoid It From Indiana University's Writing Tutorial Services.
• Plagiarism- Overview A resource from Purdue University.
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• Last Updated: Jan 16, 2024 7:02 AM
• URL: https://libguides.mit.edu/citing

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Citation Styles

Once you have decided what to cite, and whether to use direct quotations or paraphrase, you need to select a citation style. Citation styles provide the particular formats for in-text citations and bibliographies that appear in your research paper.

Usually, the choice of citation style will be based on the discipline in which you are writing. Often your professor will indicate the citation style he/she would like you to use.

Some common citation styles:

• APA Style: frequently used in the social sciences
• Chicago Style: 1) Notes and Bibliography format is often used in the humanities; 2) Author-Date format is often used in the social sciences and sciences
• MLA Style: widely used in the humanities
• Turabian: a variation of Chicago Style, also used in the humanities
• Harvard: often used in the sciences

[Important Note: Do not confuse citation styles (APA, Chicago, MLA) with citation managers (EndNote, Refworks, Zotero). Citation styles provide the particular formats for in-text citations and bibliographies that appear in your research paper. Citation managers are software programs used to download, organize, and output your citations. You can output thousands of different citation styles (including APA, Chicago, and MLA) using citation managers.]

Use a citation generator!

• ZoteroBib ZoteroBib is a is a free citation format tool that helps you build a bibliography without creating an account or installing any software.
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• Research Process
• Find Background Info
• Find Sources through the Library
• Evaluate Your Info
• Cite Your Sources
• Evaluate, Write & Cite

• is the right thing to do  to give credit to those who had the idea
• shows that you have read and understand  what experts have had to say about your topic
• helps people find the sources  that you used in case they want to read more about the topic
• provides   evidence  for your arguments
• is professional and  standard practice   for students and scholars

What is a Citation?

A citation identifies for the reader the original source for an idea, information, or image that is referred to in a work.

• In the body of a paper, the  in-text citation  acknowledges the source of information used.
• At the end of a paper, the citations are compiled on a  References  or  Works Cited  list. A basic citation includes the author, title, and publication information of the source. 

From:  Lemieux  Library,  University  of Seattle 

Why Should You Cite?

Quoting Are you quoting two or more consecutive words from a source? Then the original source should be cited and the words or phrase placed in quotes. 

Paraphrasing If an idea or information comes from another source,  even if you put it in your own words , you still need to credit the source.  General vs. Unfamiliar Knowledge You do not need to cite material which is accepted common knowledge. If in doubt whether your information is common knowledge or not, cite it. Formats We usually think of books and articles. However, if you use material from web sites, films, music, graphs, tables, etc. you'll also need to cite these as well.

Plagiarism is presenting the words or ideas of someone else as your own without proper acknowledgment of the source. When you work on a research paper and use supporting material from works by others, it's okay to quote people and use their ideas, but you do need to correctly credit them. Even when you summarize or paraphrase information found in books, articles, or Web pages, you must acknowledge the original author.

Citation Style Help

Helpful links:

• MLA ,  Works Cited : A Quick Guide (a template of core elements)
• CSE  (Council of Science Editors)

For additional writing resources specific to styles listed here visit the  Purdue OWL Writing Lab

Citation and Bibliography Resources

• How to Write an Annotated Bibliography
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• v.18(2); 2020 Apr

The Principles of Biomedical Scientific Writing: Citation

Zahra bahadoran.

1 Nutrition and Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Parvin Mirmiran

2 Department of Clinical Nutrition and Human Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Khosrow Kashfi

3 Department of Molecular, Cellular and Biomedical Sciences, Sophie Davis School of Biomedical Education, City University of New York School of Medicine, New York, United States

Asghar Ghasemi

4 Endocrine Physiology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Citation, the act of properly referring to others’ ideas, thoughts, or concepts, is a common and critical practice in scientific writing. Citations are used to give credit to own work, to support an argument, to acknowledge others’ work, to distinguish other authors’ ideas from one’s work, and to direct readers to sources of information. A good citation adds to the scientific prestige of the paper and makes it more valuable to the reader. The citation has three basic elements: quoting from others, an in-text reference to the source, and bibliographic details of the source. Beyond technical skills, the citation needs an in-depth knowledge of the field and should follow basic rules, including the selection of relevant and valid sources, stating information/facts from others’ work, and referring to others’ work accurately and ethically. Several systems and styles are used to cite scientific sources; however, the most commonly used systems in medical sciences are ‘author-date’ systems (e.g., Harvard system) and numerical systems (e.g., Vancouver system). Here, we discuss how to make an accurate, complete, and ethical citation, and provide simple and practical guides to organize references in a scientific medical paper.

According to Merriam Webster dictionary, the word citation is defined as “an act of quoting,” where quote means “to speak or write from another usually with credit acknowledgment.” In scientific communication, the citation is commonly considered a technical practice to refer to the source in the text to represent that the information is derived from an external source ( 1 , 2 ). The citation is more than just referencing; it provides more value than acknowledging the source of literature being reviewed and making a reference list ( 2 ). Citation helps the authors put their work in connection with previous ones, to tell the story artfully, to acknowledge others’ work, and to contextualize study findings ( 2 - 4 ). A well-referenced paper supports the novelty and value of the work and improves its visibility ( 5 ).

Regardless of its importance, the citation may be the least noticed aspect of a scientific manuscript ( 6 ). Citation errors, including misquotation and errors in the bibliography, are common in the medical literature. The prevalence of misquotations in different journals ranges from 10% to 20% ( 7 ), and about 50% to 70% of references of published papers contain at least one error ( 8 , 9 ). Inaccurate quotations are displeasing for the cited author, misleading for the reader, and initiate circulation of false facts ( 7 , 10 ). The consequences of bibliography errors include difficulty in reference retrieval, limitation for the reader to read more widely, failure to credit the cited author(s), and inaccuracies in citation indexes.

Following our previous guides on how to write Introduction ( 11 ), Material and Methods ( 12 ), Results ( 13 ), Discussion ( 14 ), Title ( 15 ), and Abstract and keyword ( 16 ) of a hypothesis-testing paper, here, we provide a practical guide on importance and function of the citation of a scientific medical paper. We discuss how to select sources for the citation, quote information from others’ work, refer to the sources, and make an accurate reference list for a scientific biomedical paper.

2. Functions of Citation

The citation is used to give credit to an author’s work, acknowledge other’s work, distinguish an author’s ideas from others, direct readers to original sources of information, and avoid plagiarism ( 2 - 4 , 17 ). Citation help readers to understand the work, to justify the conclusions, to judge the novelty and scope of the manuscripts ( 18 ), and critically evaluate what contribution the study makes ( 4 , 19 ). Using proper citation is the only way to use the work of others and not commit plagiarism ( 20 ). To avoid plagiarism, authors need to accurately refer to the most relevant publications and cite facts and conclusions ( 1 , 20 ). Functions of the citation in different sections of an original paper are shown in Box 1; note that the result section does not have any citation.

3. Components of the Citation

The citation has three components: (1) quotation, i.e., providing either a summary, a paraphrase or a direct quotation from others’ works, (2) in-text references, i.e., brief addressing to the source, and (3) bibliographic details, i.e., name of the authors, source of publication, date of publication.

3.1. Quotation

Quotations from other sources can be provided by direct quoting, paraphrasing, or providing a summary ( 3 ). In direct quoting, others statements (more than six consecutive words) are exactly copied, put in the quotation marks, and immediately followed by an in-text citation to the original source; every word and punctuation mark should be exactly the same as the original version ( 17 , 20 , 22 ). Direct quoting is used when original words express an idea distinctively or more concisely than your summary, as well as to present well-known statements or to provide historical context for a particular theory or construct ( 8 , 23 ). Direct quoting is not used for reporting findings of a published work, variable names, and operational definitions. Box 2 provides some practical tips for the appropriate use of direct quotations.

In paraphrasing, authors express others’ writing in their own words ( 23 ), followed by a reference to the original source. In cases of paraphrasing another’s work or idea, authors should check their statement to be accurate and fair ( 17 , 20 ). Use of synonyms and rephrasing are typical ways to change the original statements ( 9 ); however, if the paraphrase is too close to the source text in wording, syntax, and structure, it may be considered ‘patch-writing’, which is “the act of making small changes and substitutions to the copied source material” ( 24 ). Note that paraphrasing and summarizing are complex and critical academic skills and depend on one’s knowledge of the content ( 25 ).

In providing a summary, a brief statement of the main points of a work (paper, book or chapter) is presented ( 23 ) using a neutral, affiliating, or distancing approach; in affiliating and distancing approaches, not only existing knowledge is summarized but also authors present their stance/viewpoint ( 2 ). The authors need to present their approaches accurately and persuasively by using appropriate verbs ( 2 ). For a neutral summary, use of verbs ‘comment’, ‘explain’, ‘indicate’, ‘note’, ‘describe’, ‘observe’, remark’, ‘state’, and ‘find’ is recommended ( 2 ). These referring verbs can be used either in the present or the past tense; using the present tense indicates that the source is recent and still valid, whereas the past indicates that the source is older and may be out of date ( 3 ). To find further appropriate verbs and vocabularies to cite the literature being reviewed, readers can refer to other works ( 2 , 26 ).

3.2. In-Text References

In-text references (brief address to the source in text) are presented by three major systems: ‘citation-sequence’, ‘citation-name’, and ‘name-year’. In the ‘citation-sequence’ system, numbers are used to refer to the reference list ( 27 , 28 ), which is numbered sequentially according to the appearance in the text. In the ‘citation-name’ system, the numbering system is used to refer to the reference list, which is numbered in alphabetical order by authors’ names; it means numbers are used in the text regardless of the order in which they appear ( 28 ). The ‘name-year’ system consists of the surname of the author and the year of publication, and the reference list is alphabetically ordered first by author and then by year ( 28 ). If ‘name-year’ system is used, in case of referring to two references with the same first author, chronological hierarchy order is followed (e.g., Annesley, 2010; Annesley, 2011), and in case of the same first author and same publication year, the references need to be differentiated by alphabetical letters after the year of publication (e.g., Annesley, 2010a; Annesley, 2010b) ( 19 ). If the name of author/editor cannot be identified, use the title of the work and the year of publication instead; if the date is not identified, use the phrase ‘no date’ after author’s name and where both author and date are unknown, use the title followed by ‘no date’ ( 23 ).

Citation management software programs (e.g., EndNote, Reference Manager, RefWorks, ProCite, and Refbase) easily connect in-text references to the reference list. These programs can format in-text references and bibliographic details in a different style (discussed in section 4) and can change them from one style to another.

The general rule to refer to a reference in the text is to place the reference immediately after the idea or fact introduced. In other words, an in-text referring might appear in the middle of a sentence and not always at the end ( 6 , 19 ). Unless a sentence ends with a fact (in which case the citation follows), the authors should not pool all the references at the end of a sentence ( 29 ). In case of citing multiple facts in a sentence, it should be clarified which reference is corresponding to which fact ( 19 ). Wherever more than one reference is used to support a fact, the authors should refer to the references in chronological order (the oldest reference is listed as the first in-text reference) ( 19 ). For direct quoting or citing a specific idea or piece of information, the page number of the quote should be included in the in-text reference ( 23 , 30 ). For an in-text citation that refers to secondary sources (second-hand references), name the original source and then use the term ‘cited by’ followed by the reference for the work in which it is quoted (e.g., Schweer, cited by Harrison, 1992, p. 774) ( 31 ).

3.3. Bibliographic Details (Reference List)

Every in-text reference should have a corresponding entry in the reference list ( 28 ); the exceptions are ‘personal communications’ ( 28 ), and ‘unpublished data’ ( 6 ) that are referenced within the text, but do not appear in the reference list. According to the British Standards Institution, a reference is “a set of data describing a document, sufficiently precise and detailed to identify it and enable it to be located” ( 32 ). The essential elements and order of the most common forms of references, including journal articles, books, reports, and websites, are given in supplementary Box 1.

The bibliographic details provided in the reference list should be accurate and complete to ensure that readers will be able to locate the material as easily as possible ( 32 ). The accuracy of the reference list increases the credibility of the author, the journal, and the research itself ( 33 ). To increase the accuracy of the bibliographic details, ICMJE (International Committee of Medical Journal Editors) recommends that “References should be verified using either an electronic bibliographic source, such as PubMed, or print copies from original sources” ( 34 ). Errors in the reference list usually arise by copying bibliographic details from previous papers; thus, authors should not copy from reference lists or databases, and the only reliable source is the original paper published in the journal ( 8 ). In case of using second-hand information, bibliographic detail of a source, where the information is found, should be included in the reference list.

4. Referencing Systems and Styles

Broadly, three types of referencing systems are employed in the academic world ( 3 ). These are, (i) consecutive-numbering system (well-known as Vancouver), (ii) author name-publication year system (well-known as Harvard) ( 19 ); (iii) footnote/endnote system, where sources are listed at the bottom of the page or at the end of the paper and the numbers in superscript run consecutively throughout the paper ( 3 ). The first two systems are commonly used in medicine, whereas the third system is most often used in the humanities. Other less common reference styles that have been established and used within different fields of science and disciplines include Modern Language Association (MLA) ( 35 ), the American Psychological Association (APA) ( 36 ), the Chicago Manual of Style (CMS), and the American Medical Association (AMA) Style ( 29 ).

The first format for bibliographic references in medical science was adopted officially by the Vancouver Group and the National Library of Medicine (NLM), in 1979 ( 37 ). The Vancouver Group was a small group of editors of medical journals who met informally in 1978 in Vancouver, British Columbia, to establish guidelines for the format of manuscripts submitted to their journals ( 37 ); the group expanded into the ICMJE and developed ‘the Uniform Requirements for Manuscripts Submitted to Biomedical Journals,’ which is updated regularly ( 38 ) ( http://www.icmje.org ). The reference style is famed as the Vancouver style because of its origin, and it has become a broadly accepted bibliographic format ( 8 ). According to the Vancouver style (the author-number system), references are numbered consecutively in the order in which they are first mentioned in the text; references in text, tables, and legends should be identified by Arabic numerals in parentheses ( 38 ). The Vancouver style is used by PubMed and MEDLINE.

The Harvard system, so-called as the ‘parenthetical author-date method’, is another popular referencing system ( 31 ). The origin of the system is obscure; however, the first evidence of the system goes back to 1881, when Edward Laurens Mark, professor of anatomy and director of Harvard’s zoological laboratory, published a landmark cytological paper and used parenthetic author-year citation ( 39 ). As Chernin narrated ( 39 ), from an editorial note in the British Medical Journal in 1945, the expression ‘Harvard system’ was not introduced by the Harvard University, but an English visitor to the library of Harvard University was impressed by the system of bibliographical reference and named it as the ‘Harvard system’ upon their return to England. The Royal Society defined the Harvard referencing system in 1965 as “a system in which names and dates are given in the body of the text and the references alphabetically at the end of the paper” ( 31 ).

Although most biomedical journals have adopted the Vancouver style, some still prefer the Harvard system, because they like to know just what author(s) is/are being cited as they read the text ( 40 ). However, the Harvard system is criticized due to potential difficulties that it may create for the readers. For example, if they are interested in an item in the reference list, they need to look it up within the main text. This system may also disrupt the text when a large number of references need to be cited within a paragraph ( 40 ).

Although medical journals specify Vancouver or Harvard systems, some journals have made minor modifications ( 41 ). For example, they have modified the referencing systems, both in-text references, and bibliographies, they have changed punctuation marks, used bold, and italics enhancements, alphabetical or sequential ordering of references, or have made combinations of variations that create a unique reference style that is as large in number as the number of journals currently published ( 41 , 42 ). Authors should carefully follow the format used by the target journal that is usually given in the Information/Instructions for Authors.

5. Other Considerations

5.1. dealing with scientific sources.

The most important challenge of the citation process in a scientific work is ‘which sources must be selected for citation’ and ‘How do the authors deal with the literature being reviewed to cite others accurately and ethically?’ Existence of a large number of publications on the topic makes selection difficult; however, authors should artfully select them to cover all citation purposes and add to the manuscript scientific prestige ( 43 ). Among available sources, the most relevant, valid, methodologically sound, and those with a landmark contribution to the topic should be selected ( 9 , 17 ). If there are a significant number of prior studies on the topic, the most comprehensive and the most recent works should be selected because they presumably discuss and reference the older studies ( 44 ).

The most valid and available sources for citing are published peer-reviewed original journal articles; primary sources (research articles written by those who conducted the research) are preferred ( 21 ). Secondary sources (review papers) can be used when primary sources are unavailable, or a summary for elaborating research problem is more effective; however, they should not be taken as definitive word or fact on the topic ( 9 ). Citation of review articles rather than the original papers should be limited ( 45 , 46 ) since it fails to provide credit or acknowledge the effort of the authors of original research papers. In addition, it may lead to misinterpretation or oversimplification of original research findings ( 45 ). The use of high-quality systematic review is acceptable; otherwise, it should be acknowledged in the text as a review paper to prevent misleading the casual reader about the originality of the work ( 9 ).

Less valid sources (i.e., theses, conference proceeding papers, unpublished data, abstracts, and personal communications) are not recommended ( 19 ) unless they contain essential information not available from public sources ( 47 ). These less valid references can only be used for supporting the results of preliminary studies or citing parallel results in another study population ( 17 ). In case of referring to ‘unpublished sources’ or ‘personal communications,’ the written permission of the author is required to ensure the accuracy of the data and prior approval from the authors ( 6 , 17 ).

Sources that may not be found in public domain, e.g., submitted but unaccepted journal articles, meeting abstracts, and posters should not be used ( 6 , 17 ). Standard textbooks are not cited except for describing a theoretical or methodologic principle or a statistical procedure. As stated by ICMJE, authors are responsible for checking that the references cited not be retracted articles ( 34 ).

5.2. Statement Needs to be Supported by a Reference

As a general rule, findings/statements of other’s work need to be supported by references ( 9 ). Statements like ‘the literature suggest that…’ or ‘there is general agreement that…’ should be followed by addressing one or more references ( 9 ); it is, however, not appropriate and usually essential to support a statement with more than 3 or 4 references ( 9 ). In contrast, common knowledge in a field, defined as facts, dates, events, or information that are expected to be known by someone studying or working in a particular field (e.g., long-established facts or theories), or facts that can be found publicly (e.g., date of the second world war) and are likely to be known by many people (e.g., capital cities of the countries) do not generally have to be referenced ( 23 ).

5.3. Accuracy and Ethics of the Citation

Accurate citation is a crucial issue, enabling readers to follow the flow of ideas and statements in a scientific field and ensure the integrity of the science being communicated ( 19 , 48 ). Citing the sources without retrieving and reading their full-texts and understanding their entirety ( 19 ), giving multiple similar references to support a single statement, or using a single source to support multiple statements are among examples of inaccurate citations ( 48 ). Since an abstract is a brief summary of the work, its content may not accurately present details reported in the text, and therefore, it is a poor practice to cite references after skimming results of the abstract rather considering the whole text ( 9 ).

To avoid inaccurate quoting, the authors should review the entire original article to check the facts. They should be careful in case of paraphrasing or summarizing in order to make sure that the intent or meaning of the original author is not altered ( 49 ). To reduce the risk of misinterpretation of information, the use of secondary sources should be avoided ( 49 ). According to NLM, “The medical literature is full of references that have been cited from other references, serving only to perpetuate erroneous information”, thus, they emphasizes that the authors should never reference documents that they have not read ( 27 ).

Spurious citation, biased citation, and over self-citation are also common problems of citation (Box 3). Self-citation, defined as citing one’s own work in a scientific paper, is a common practice and is an essential part of scientific communication, which represents the continuous and cumulative nature of the research process ( 50 ). When a researcher works on a specific topic for years, 25% self-citation is not uncommon ( 46 ). However, either irrelevant self-citation or over self-citation are considered unethical practices, which affect the precision of the paper ( 50 , 51 ). The spurious citation occurs where sources are not needed but are included anyway, e.g., over-citation or redundant citation (i.e., where the extra sources do not add any value beyond the first source), or citing an obscure, historical reference to give an impression of erudition ( 4 ).

6. Common Errors and Problems of Citation

Citation errors reflect badly on the authors and the publishing journal and may reflect underlying flaws in other areas of the published research ( 33 ). Citation content errors (e.g., inaccurate quoting from others) and both major and minor errors in referencing (both in-text references and bibliographic details) can occur during the citation process ( 4 , 7 , 33 ). Inaccurate quotations or misquotations are perpetual citation errors that lead to circulate a false ‘accepted fact’, which are very hard to correct ( 10 ). A list of common citation errors is provided in Box 3.

Major errors in references, which are responsible for up to 21% of citation errors in the medical field ( 53 ), prevent the source being retrievable ( 4 ). With minor errors (i.e., punctuation and spelling mistakes in bibliography, i.e., name of authors, title, journal, volume, year, and page numbers), references can still be found ( 4 , 9 ). Potential pitfalls of citation-management software programs may also cause some citation errors ( 54 ). Several duplicate copies of a reference in the software may be inserted due to importing the same reference on a number of different occasions (maybe with different patterns); this may lead to the appearance of duplication in the reference list ( 6 , 48 ). In the case of anonymous papers (prepared by a committee or a group of authors), some mistakes may occur ( 54 ). Another common mistake relates to the journal-title; the journal-title may be imported in the abbreviated form, while both full title and conventional abbreviation need to be entered into the journal section of the reference manager ( 54 ). To sum up, the author is responsible for final checking the accuracy of the bibliographic details ( 19 ) and should correct reference manager databases before the reference is exported to the final bibliography.

7. Conclusion

Making good and accurate citations adds to the manuscript’s scientific prestige and signifies that authors have an in-depth knowledge of the literature and writing skills. An original research paper usually has 25 - 40 references and the authors should be note that citing too few or too many references may reflect poor intellectual attitude and work validity. The most important, most elegant and the most recent sources should be selected for citation.

Authors' Contribution: Study concept and design: Zahra Bahadoran and Asghar Ghasemi; drafting of the manuscript: Zahra Bahadoran, Parvin Mirmiran, and Asghar Ghasemi; critical revision of the manuscript for important intellectual content: Khosrow Kashfi and Parvin Mirmiran.

Conflict of Interests: The authors have no conflict of interest.

Funding/Support: This study was supported by the Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences.

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MLA Formatting and Style Guide

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The following overview should help you better understand how to cite sources using MLA  9 th edition, including how to format the Works Cited page and in-text citations.

Please use the example at the bottom of this page to cite the Purdue OWL in MLA. See also our MLA vidcast series on the Purdue OWL YouTube Channel .

Creating a Works Cited list using the ninth edition

MLA is a style of documentation that may be applied to many different types of writing. Since texts have become increasingly digital, and the same document may often be found in several different sources, following a set of rigid rules no longer suffices.

Thus, the current system is based on a few guiding principles, rather than an extensive list of specific rules. While the handbook still describes how to cite sources, it is organized according to the process of documentation, rather than by the sources themselves. This gives writers a flexible method that is near-universally applicable.

Once you are familiar with the method, you can use it to document any type of source, for any type of paper, in any field.

Here is an overview of the process:

When deciding how to cite your source, start by consulting the list of core elements. These are the general pieces of information that MLA suggests including in each Works Cited entry. In your citation, the elements should be listed in the following order:

• Title of source.
• Title of container,
• Other contributors,
• Publication date,

Each element should be followed by the corresponding punctuation mark shown above. Earlier editions of the handbook included the place of publication and required different punctuation (such as journal editions in parentheses and colons after issue numbers) depending on the type of source. In the current version, punctuation is simpler (only commas and periods separate the elements), and information about the source is kept to the basics.

Begin the entry with the author’s last name, followed by a comma and the rest of the name, as presented in the work. End this element with a period.

Bhabha, Homi K. The Location of Culture. Routledge, 1994.

Title of source

The title of the source should follow the author’s name. Depending upon the type of source, it should be listed in italics or quotation marks.

A book should be in italics:

Henley, Patricia. The Hummingbird House . MacMurray, 1999.

An individual webpage should be in quotation marks. The name of the parent website, which MLA treats as a "container," should follow in italics:

Lundman, Susan. "How to Make Vegetarian Chili." eHow, www.ehow.com/how_10727_make-vegetarian-chili.html.*

A periodical (journal, magazine, newspaper) article should be in quotation marks:

Bagchi, Alaknanda. "Conflicting Nationalisms: The Voice of the Subaltern in Mahasweta Devi's Bashai Tudu." Tulsa Studies in Women's Literature , vol. 15, no. 1, 1996, pp. 41-50.

A song or piece of music on an album should be in quotation marks. The name of the album should then follow in italics:

Beyoncé. "Pray You Catch Me." Lemonade, Parkwood Entertainment, 2016, www.beyonce.com/album/lemonade-visual-album/.

*The MLA handbook recommends including URLs when citing online sources. For more information, see the “Optional Elements” section below.

Title of container

The eighth edition of the MLA handbook introduced what are referred to as "containers," which are the larger wholes in which the source is located. For example, if you want to cite a poem that is listed in a collection of poems, the individual poem is the source, while the larger collection is the container. The title of the container is usually italicized and followed by a comma, since the information that follows next describes the container.

Kincaid, Jamaica. "Girl." The Vintage Book of Contemporary American Short Stories, edited by Tobias Wolff, Vintage, 1994, pp. 306-07.

The container may also be a television series, which is made up of episodes.

“94 Meetings.” Parks and Recreation, created by Greg Daniels and Michael Schur, performance by Amy Poehler, season 2, episode 21, Deedle-Dee Productions and Universal Media Studios, 2010.

The container may also be a website, which contains articles, postings, and other works.

Wise, DeWanda. “Why TV Shows Make Me Feel Less Alone.”  NAMI,  31 May 2019,  www.nami.org/Blogs/NAMI-Blog/May-2019/How-TV-Shows-Make-Me-Feel-Less-Alone . Accessed 3 June 2019.

In some cases, a container might be within a larger container. You might have read a book of short stories on Google Books , or watched a television series on Netflix . You might have found the electronic version of a journal on JSTOR. It is important to cite these containers within containers so that your readers can find the exact source that you used.

“94 Meetings.” Parks and Recreation , season 2, episode 21, NBC , 29 Apr. 2010. Netflix, www.netflix.com/watch/70152031?trackId=200256157&tctx=0%2C20%2C0974d361-27cd-44de-9c2a-2d9d868b9f64-12120962.

Langhamer, Claire. “Love and Courtship in Mid-Twentieth-Century England.” Historical Journal , vol. 50, no. 1, 2007, pp. 173-96. ProQuest, doi:10.1017/S0018246X06005966. Accessed 27 May 2009.

Other contributors

In addition to the author, there may be other contributors to the source who should be credited, such as editors, illustrators, translators, etc. If their contributions are relevant to your research, or necessary to identify the source, include their names in your documentation.

Foucault, Michel. Madness and Civilization: A History of Insanity in the Age of Reason. Translated by Richard Howard , Vintage-Random House, 1988.

Woolf, Virginia. Jacob’s Room . Annotated and with an introduction by Vara Neverow, Harcourt, Inc., 2008.

If a source is listed as an edition or version of a work, include it in your citation.

The Bible . Authorized King James Version, Oxford UP, 1998.

Crowley, Sharon, and Debra Hawhee. Ancient Rhetorics for Contemporary Students. 3rd ed., Pearson, 2004.

If a source is part of a numbered sequence, such as a multi-volume book or journal with both volume and issue numbers, those numbers must be listed in your citation.

Dolby, Nadine. “Research in Youth Culture and Policy: Current Conditions and Future Directions.” Social Work and Society: The International Online-Only Journal, vol. 6, no. 2, 2008, www.socwork.net/sws/article/view/60/362. Accessed 20 May 2009.

Quintilian. Institutio Oratoria. Translated by H. E. Butler, vol. 2, Loeb-Harvard UP, 1980.

The publisher produces or distributes the source to the public. If there is more than one publisher, and they are all are relevant to your research, list them in your citation, separated by a forward slash (/).

Klee, Paul. Twittering Machine. 1922. Museum of Modern Art, New York. The Artchive, www.artchive.com/artchive/K/klee/twittering_machine.jpg.html. Accessed May 2006.

Women's Health: Problems of the Digestive System . American College of Obstetricians and Gynecologists, 2006.

Daniels, Greg and Michael Schur, creators. Parks and Recreation . Deedle-Dee Productions and Universal Media Studios, 2015.

Note : The publisher’s name need not be included in the following sources: periodicals, works published by their author or editor, websites whose titles are the same name as their publisher, websites that make works available but do not actually publish them (such as  YouTube ,  WordPress , or  JSTOR ).

Publication date

The same source may have been published on more than one date, such as an online version of an original source. For example, a television series might have aired on a broadcast network on one date, but released on  Netflix  on a different date. When the source has more than one date, it is sufficient to use the date that is most relevant to your writing. If you’re unsure about which date to use, go with the date of the source’s original publication.

In the following example, Mutant Enemy is the primary production company, and “Hush” was released in 1999. Below is a general citation for this television episode:

“Hush.” Buffy the Vampire Slayer , created by Joss Whedon, performance by Sarah Michelle Gellar, season 4, Mutant Enemy, 1999 .

However, if you are discussing, for example, the historical context in which the episode originally aired, you should cite the full date. Because you are specifying the date of airing, you would then use WB Television Network (rather than Mutant Enemy), because it was the network (rather than the production company) that aired the episode on the date you’re citing.

“Hush.” Buffy the Vampire Slayer, created by Joss Whedon, performance by Sarah Michelle Gellar, season 4, episode 10, WB Television Network, 14 Dec. 1999 .

You should be as specific as possible in identifying a work’s location.

An essay in a book or an article in a journal should include page numbers.

Adiche, Chimamanda Ngozi. “On Monday of Last Week.” The Thing around Your Neck, Alfred A. Knopf, 2009, pp. 74-94 .

The location of an online work should include a URL.  Remove any "http://" or "https://" tag from the beginning of the URL.

Wheelis, Mark. "Investigating Disease Outbreaks Under a Protocol to the Biological and Toxin Weapons Convention." Emerging Infectious Diseases , vol. 6, no. 6, 2000, pp. 595-600, wwwnc.cdc.gov/eid/article/6/6/00-0607_article. Accessed 8 Feb. 2009.

When citing a physical object that you experienced firsthand, identify the place of location.

Matisse, Henri. The Swimming Pool. 1952, Museum of Modern Art, New York .

Optional elements

The ninth edition is designed to be as streamlined as possible. The author should include any information that helps readers easily identify the source, without including unnecessary information that may be distracting. The following is a list of optional elements that can be included in a documented source at the writer’s discretion.

Date of original publication:

If a source has been published on more than one date, the writer may want to include both dates if it will provide the reader with necessary or helpful information.

Erdrich, Louise. Love Medicine. 1984. Perennial-Harper, 1993.

City of publication:

The seventh edition handbook required the city in which a publisher is located, but the eighth edition states that this is only necessary in particular instances, such as in a work published before 1900. Since pre-1900 works were usually associated with the city in which they were published, your documentation may substitute the city name for the publisher’s name.

Thoreau, Henry David. Excursions . Boston, 1863.

Date of access:

When you cite an online source, the MLA Handbook recommends including a date of access on which you accessed the material, since an online work may change or move at any time.

Bernstein, Mark. "10 Tips on Writing the Living Web." A List Apart: For People Who Make Websites, 16 Aug. 2002, alistapart.com/article/writeliving. Accessed 4 May 2009.

As mentioned above, while the MLA handbook recommends including URLs when you cite online sources, you should always check with your instructor or editor and include URLs at their discretion.

A DOI, or digital object identifier, is a series of digits and letters that leads to the location of an online source. Articles in journals are often assigned DOIs to ensure that the source is locatable, even if the URL changes. If your source is listed with a DOI, use that instead of a URL.

Alonso, Alvaro, and Julio A. Camargo. "Toxicity of Nitrite to Three Species of Freshwater Invertebrates." Environmental Toxicology , vol. 21, no. 1, 3 Feb. 2006, pp. 90-94. Wiley Online Library, doi: 10.1002/tox.20155.

Creating in-text citations using the previous (eighth) edition

Although the MLA handbook is currently in its ninth edition, some information about citing in the text using the older (eighth) edition is being retained. The in-text citation is a brief reference within your text that indicates the source you consulted. It should properly attribute any ideas, paraphrases, or direct quotations to your source, and should direct readers to the entry in the Works Cited list. For the most part, an in-text citation is the  author’s name and the page number (or just the page number, if the author is named in the sentence) in parentheses :

When creating in-text citations for media that has a runtime, such as a movie or podcast, include the range of hours, minutes and seconds you plan to reference. For example: (00:02:15-00:02:35).

Again, your goal is to attribute your source and provide a reference without interrupting your text. Your readers should be able to follow the flow of your argument without becoming distracted by extra information.

How to Cite the Purdue OWL in MLA

Entire Website

The Purdue OWL . Purdue U Writing Lab, 2019.

Individual Resources

Contributors' names. "Title of Resource." The Purdue OWL , Purdue U Writing Lab, Last edited date.

The new OWL no longer lists most pages' authors or publication dates. Thus, in most cases, citations will begin with the title of the resource, rather than the developer's name.

"MLA Formatting and Style Guide." The Purdue OWL, Purdue U Writing Lab. Accessed 18 Jun. 2018.

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This guide covers the three main citation styles you may be asked to use while attending Seattle University. Please review the examples and information, and if you need more support, see the Style Manuals provided by the library, either in print or ebook form. 

if you are looking for instructions on citing artworks, photographs, or visual media, check the Citing Artworks or Images  Section, sorted by citation style. 

• Purdue Online Writing Lab (OWL) Citation guides A somewhat out of date, but detailed guide to citations in all three major styles.

Manual of Style:  This refers to a detailed guide to a particular citation style, such as the Chicago Manual of Style. These get updated regularly, so be sure to check with your professor which edition they want you to use for your assignments.

DOI:  Digital object identifier, which is a specific code that corresponds to a digital object like an article or ebook.

ORCID ID:  Similar to a DOI, the ORCID ID is a specific code that corresponds to a specific author/researcher. 

et al:  Means "and others" in latin. This is sometimes used in citations when there are more than a certain number of authors.

Citation:  A citation is a collection of information that tells your reader that certain material in your work came from another source. It also gives your reader all the information necessary to find the location of any source included in your reference list/bibliography/works cited.

Useful Differences between Citation Styles

Differences between APA, MLA, and Chicago:

APA:  The list of citations at the end is called a Reference List.

MLA : The list of citations at the end is called a Works Cited.

Chicago/Turabian:  The list of citations at the end is called a Bibliography.

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Citations are for transparency and access. Academic papers are conversations between multiple authors and responsible scholarship dictates that we properly credit scholars with their work when it is mentioned.

In addition to proving that you've done your due diligence as an academic, citations let readers know what you've read and where they can access a source you've used.

APA Style (American Psychological Association)

Used primarily in Education, Behavioral Sciences, and Social Sciences.

• This style supports disciplines that emphasizes the date in publication. In APA Style, the date directly follows the author's name.
• Uses parenthetical in-text citations. Sources are compiled on a "References" page.

Chicago (also known as Turabian) Citation Style

Notes and bibliography systems.

• Used in some Humanities disciplines (including History, Literature, and the Arts).
• This system can accommodate a variety of source types that are more difficult to format in the author-date system.
• Uses footnotes for in-text citations. Sources are compiled on a "Bibliography" page.

Author-date systems

• Used in the Sciences and some Social Sciences disciplines.
• This systems looks and functions very similarly to APA Style.
• Utilizes parenthetical in-text citations. Sources are compiled on a "References" or "Literature Cited" page.

MLA Style (Modern Language Association)

• Humanities research emphasizes authorship. In MLA style citations, the author is most important data point.
• Uses parenthetical in-text citations. Sources are compiled on a "Works Cited" page.
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What is a citation and citation style?

A citation is a way of giving credit to individuals for their creative and intellectual works that you utilized to support your research. It can also be used to locate particular sources and combat plagiarism. Typically, a citation can include the author's name, date, location of the publishing company, journal title, or DOI (Digital Object Identifier).

A citation style dictates the information necessary for a citation and how the information is ordered, as well as punctuation and other formatting.

How to do I choose a citation style?

There are many different ways of citing resources from your research. The citation style sometimes depends on the academic discipline involved. For example:

• APA (American Psychological Association) is used by Education, Psychology, and Sciences
• MLA (Modern Language Association) style is used by the Humanities
• Chicago/Turabian style is generally used by Business, History, and the Fine Arts
• IEEE Style is often used in Engineering

You will need to consult with your professor to determine what is required in your specific course.

• More Information about APA Style

• Official APA Homepage An American Psychology Association hosted website with information on APA citation and related resources.
• Purdue Online Writing Lab - APA Online writing lab with formatting tips and sample papers. The "Cite your source automatically" feature on Purdue Owl pages is part of another website, and not recommended.
• Excelsior Writing Lab Citation examples, videos, and formatting guides for MLA, APA, and Chicago styles.

The 9th edition of the MLA Handbook was published in 2021. In this update, the format for both in-text and Works Cited citations is the same as the 8th edition. The 9th edition also includes this clarification on citing a film/DVD.

A film/DVD: Generally list film directors as key contributors in the Contributor element Blade Runner . 1982. Directed by Ridley Scott, director’s cut, Warner Bros., 1992.

• Official MLA Style Homepage A Modern Language Association hosted website with information on MLA citation and related resources.
• Purdue Online Writing Lab - MLA Online writing lab with formatting tips and sample papers. The "Cite your source automatically" feature on Purdue Owl pages is part of another website, and not recommended.
• Citation Styles: APA, MLA, Chicago, Turabian, IEEE by ULS Librarian Last Updated Mar 22, 2024 363693 views this year
• More Information about Chicago Manual of Style

• Chicago Manual of Style Online Fully searchable version of the standard Chicago Manual of Style, including a Quick Guide for sample citations. Chicago Style Q&A as well as examples of style sheets, letters, and forms are also available on the site.
• Official Chicago Manual Style Quick Guide A quick guide with citation examples offered by the Chicago Style manual homepage.
• More Information about Turabian Style

• Turabian Citation Guide A quick guide on proper Turabian style citation offered by the Chicago University Press.
• More information about IEEE Style
• IEEE Editorial Style Manual The Institute for Electrical and Electronics Engineers (IEEE) is a professional organization supporting many branches of engineering, computer science, and information technology. IEEE citation style includes in-text citations, numbered in square brackets, which refer to the full citation listed in the reference list at the end of the paper. The reference list is organized numerically, not alphabetically.
• Murdoch University IEEE guide This is an excellent guide that covers all aspects of citing in IEEE style. Check out the Reference List Entries page for details about citing a variety of material types.
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How to Cite and Manage Sources

• Citing Sources
• Chicago (Turabian) Style
• Other Styles
• Adding References to EndNote Online
• Using the Capture Reference Browser Tool
• Using Cite While You Write for EndNote in MS Word
• Using EndNote with CatalogUSMAI
• Saving Citation
• Generating Bibliography
• Cloud Storage

Why should I cite?

There are three main reasons to cite your sources.

1. Avoid plagiarism - Using someone else's words or ideas and presenting them as your own is plagiarism.

2. Provide authority - Show support for statements in your text.

3. Locate sources - Allow others to find the source materials you used.

More Resources: Purdue Online Writing Lab (OWL) ,  Avoiding Plagiarism and Citing Sources: Why & How to Do It 

When should I cite?

You should provide a citation whenever your writing is based on someone else's work or ideas. Provide a citation when you:

Quote - use phrases or sentences exactly as they appear in the source document.

Paraphrase - restate an idea from the source document using your own words.

Summarize - briefly restate the main ideas from the source document.

See also: Quoting and Paraphrasing 

What should I cite?

Your citation should be detailed enough to allow a reader to find the source document. Citation styles can vary. For more information, consult the appropriate citation style from the menu at the top of the page. In general, a citation should include the following information:

Title (book, article, chapter, etc.)

Source title (journal, book, newspaper, etc.)

Volume number (and issue number for some journals)

Place of publication (for books)

Publisher (for books)

Publication date (last revised date for electronic resources)

Page numbers (print resources)

Citations for electronic sources (web pages, online articles, etc) may require the following additional information:

Database (Academic Search Premier, JSTOR, etc.)

Database provider (EBSCO, CSA, etc.)

Publication medium (Web)

Date viewed (day, month, year)

URL (web address)

Remember, it is better to include too much information rather than too little.

Take a look at Citing Government Documents for help in creating government document citations.

Where should I cite?

In general you should:

1.  Include a parenthetical note, numbered citation or footnote in the text when quoting, summarizing or paraphrasing someone  else's work.

Parenthetical note: Parenthetical references vary depending on the citation style you use: Citations in APA style include the author and publication date (Author, year). MLA citations include page numbers, but no date (Author pages).

Numbered citation: Some citation styles require you to number citations. Numbered citations may be in parentheses(1), superscript 2 , or italics 3 .

Footnotes: Footnotes are generally indicated by superscript numbers. 1 ------- 1. The note itself is located at the bottom of the same page, separated from the main text by a short horizontal line.

2.  Provide a list of cited works at the end of the paper (bibliography, references, literature cited, etc.)

Reference lists for papers using parenthetical notes are listed alphabetically, by author's last name: Author A. "Article Title." Source Title. Volume.Issue (Year): Pages. Author, B. B., & Author, C. C. (year). Title. Place of publication: Publisher.

Numbered citations are collected in numerical order: 1. Author. Book Title, Edition Number; Series Information; Publisher: Place of Publication, Year; Volume Number, pages. 2. Author. Title of Website. URL (accessed date).

Papers using footnotes often include alphabetical bibliographies at the end of the paper: Author, A. "Article title." In Encyclopedia Title. Place of publication: Publisher. edition. Year. Author, B. "Article Title." Journal Title volume, no. issue (year): page numbers.

Which citation style should I use?

The citation style you use may depend on several factors. A specific style may be:

Required by your instructor

Required by the journal (if you are writing for publication)

Commonly used in your discipline

 For more information, consult the appropriate citation style (APA, MLA, etc.) from the menu at the side of this guide.

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• Last Updated: Aug 22, 2023 10:29 AM
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• Citation Styles

What citation style to use for science [Updated 2023]

What citation style should you use for a science paper? In this post, we explore the most frequently used citation styles for science. We cover APA, IEEE, ACS, and others and provide examples of each style.

APA (American Psychological Association) style is a citation format used in the social sciences, education, and engineering, as well as in the sciences. APA consists of two elements: in-text citations and a reference list.

It uses an author-date system, in which the author’s last name and year of publication are put in parentheses (e.g. Smith 2003). These parenthetical citations refer the reader to a list at the end of the paper, which includes information about each source.

APA style resources

🌐 Official APA style guidelines

🗂 APA style guide

📝 APA citation generator

APA style examples

Here is an example of an in-text citation in APA style:

In recent years, much debate has been stirred regarding volcanic soil (Avşar et al., 2018) .

Here is a bibliography entry in APA style:

Avşar, E., Ulusay, R., Aydan, Ö., & Mutlutürk, M . ( 2015 ). On the Difficulties of Geotechnical Sampling and practical Estimates of the Strength of a weakly bonded Volcanic Soil . Bulletin of Engineering Geology and the Environment , 74 ( 4 ), 1375–1394 . https://doi.org/10.1007/s10064-014-0710-9

Chicago style is another form of citation used for science papers and journals. It has two formats: a notes and bibliography system and an author-date system.

The notes and bibliography system is mostly used for the humanities, whereas the author-date system is used in science and business. The latter uses in-text citations formed by the author's last name and date of publication. A bibliography at the end of the paper lists the full information for all references.

Chicago style resources

🌐 Official Chicago style guidelines

🗂 Chicago style guide

📝 Chicago citation generator

Chicago style examples

Here is an in-text citation in Chicago style:

However, a research proved this theory right (Hofman and Rick 2018, 65-115) .

Here is a bibliography entry in Chicago style:

Hofman, Courtney A., and Torben C. Rick . “ Ancient Biological Invasions and Island Ecosystems: Tracking Translocations of Wild Plants and Animals .” Journal of Archaeological Research 26 , no. 1 ( 2018 ): 65–115 . doi.org/10.1007/s10814-017-9105-3 .

CSE style is the standard format used in the physical and life sciences. This style features three types of citation systems: citation-sequence, name-year, and citation-name.

• Name-Year : In-text citations of this type feature the author’s last name and the year of publication in brackets. A bibliography at the end lists all references in full.

• Citation-Sequence : Every source is assigned a superscript number that is used as an in-text reference. The bibliography at the end lists all numbers with their references in the order in which they appeared in the text.

• Citation-Name : The reference list is organized alphabetically by authors’ last names; each name is assigned a number which can be placed in superscript as an in-text reference.

CSE style resources

🌐 Official CSE style guidelines

📝 CSE citation generator

CSE style examples

Here is an example of an in-text citation in CSE name-year style:

Therefore, the translocation of wild plants was tracked (Hofman and Rick 2018) .

Here is a bibliography entry in CSE name-year style:

Hofman CA, Rick TC. 2018. Ancient Biological Invasions and Island Ecosystems: Tracking Translocations of Wild Plants and Animals. J. Archaeol. [accessed 2019 Mar 11]; 26(1): 65–11. doi.org/10.1007/s10814-017-9105-3.

AIP style, as its title suggests, is commonly applied in physics and astronomy papers. This style has a numbered citation system , which uses superscript numbers to show in-text citations. These numbers correspond to a list of sources at the end of the paper.

AIP style resources

🌐 Official AIP style guidelines

🗂 AIP style guide

📝 AIP citation generator

AIP style examples

Here is an in-text citation in AIP style:

A similar study was carried out in 2015 ¹ .

Here is a bibliography entry in AIP style:

¹ H.D. Young and R.A. Freedman, Sears & Zemansky's University Physics (Addison-Wesley, San Francisco, CA, 2015) p. 160

ACS style is the standard citation style for chemistry. This style uses both numeric and author-date citations systems. The numbered in-text citations can have either a superscript number or a number in italics. Full references for each source are listed at the end of the paper.

ACS style resources

🌐 Official ACS style guidelines

🗂 ACS style guide

📝 ACS citation generator

ACS style examples

Here is an in-text citation in ACS author-date style:

The opposing side was given first (Brown et al., 2017) .

Here is a bibliography entry in ACS author-date style:

Brown, T.E.; LeMay H.E.; Bursten, B.E.; Murphy, C.; Woodward, P.; Stoltzfus M.E. Chemistry: The Central Science in SI Units . Pearson: New York, 2017.

IEEE style is used for engineering and science papers. This style uses a numeric, in-text citation format, with a number in square brackets. This number corresponds to a reference list entry at the end of the paper.

IEEE style resources

🌐 Official IEEE style guidelines

🗂 IEEE style guide

📝 IEEE citation generator

IEEE style examples

Here is an example of an in-text citation in IEEE style:

As seen in a multi-camera study [1] ...

Here is a bibliography entry in IEEE style:

[1] E. Nuger and B. Benhabib, “Multi-Camera Active-Vision for Markerless Shape Recovery of Unknown Deforming Objects,” J. Intell. Rob. Syst. , vol. 92, no. 2, pp. 223–264, Oct. 2018.

Frequently Asked Questions about citation styles used in science

The most frequently used citation style in the sciences is APA (American Psychological Association) style.

There are two major types of citation systems you can use: author-date or numeric. Numeric citation styles tend to be preferred for science disciplines.

Yes, you have to add a bibliography or reference list citing all sources mentioned in your scientific paper.

Some of the most popular scientific journals are: Science Magazine , Nature , and The Lancet .

Title pages for science papers must follow the format of the citation style that you’re using. For example, in APA style you need to include a title, running head, a name, and other details. Visit our guide on title pages to learn more.

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For students and teachers.

Essential Rules for Academic Writing: A Beginner’s Guide

Unlock the key rules for academic writing: from structure to citations. Master scholarly communication with expert insights.

Mastering the art of academic writing is a fundamental skill that empowers students and researchers to express their ideas, convey complex concepts, and contribute meaningfully to their respective fields. However, for beginners venturing into the realm of scholarly writing, navigating the intricacies of this formal discourse can be a daunting task.

“Essential Rules for Academic Writing: A Beginner’s Guide” serves as a beacon of guidance, illuminating the path for aspiring scholars as they embark on their academic journey. This comprehensive article offers invaluable insights into the fundamental principles and key rules that underpin successful academic writing, providing a strong foundation for those new to the craft.

What Is Academic Writing?

Academic writing refers to a formal style of writing that is prevalent in academic settings such as universities, research institutions, and scholarly publications. It is a mode of communication used by students, researchers, and scholars to convey their ideas, present research findings, and engage in intellectual discourse within their respective fields of study.

Related article: 11 Best Grammar Checker Tools For Academic Writing

Unlike other forms of writing, academic writing adheres to specific conventions and standards that prioritize clarity, precision, objectivity, and critical thinking. It is characterized by a rigorous approach to presenting arguments, supporting claims with evidence, and adhering to the principles of logic and reasoning.

Academic writing encompasses a wide range of genres, including essays, research papers, literature reviews, theses, dissertations, conference papers, and journal articles. Regardless of the specific genre, academic writing typically follows a structured format, includes proper citation and referencing, and adheres to established academic style guides such as APA (American Psychological Association) or MLA (Modern Language Association).

Types Of Academic Writing

Here’s a table summarizing the different types of academic writing, along with their definitions, purposes and typical structures:

Also read: Words To Use In Essays: Amplifying Your Academic Writing

General Rules For Academic Writing

Here are some general rules for academic writing: by adhering to these general guidelines, you can enhance the clarity, effectiveness, and professionalism of your academic writing, ensuring that your ideas are communicated with precision and impact.

Clarity and Precision

Academic writing demands clarity and precision in the expression of ideas. Use clear and concise language to communicate your thoughts effectively. Avoid ambiguous or vague statements, and strive for a logical flow of ideas within your writing.

Audience Awareness

Consider your intended audience when writing academically. Be aware of their background knowledge and familiarity with the topic. Adapt your writing style and level of technicality accordingly, ensuring that your content is accessible and understandable to your readers.

Use Formal Language

Academic writing requires a formal tone and language. Avoid colloquialisms, slang, and overly informal expressions. Instead, employ a vocabulary appropriate to the academic context, using specialized terms when necessary.

Structure and Organization

Structure your writing in a logical and coherent manner. Use clear headings, subheadings, and paragraphs to guide the reader through your work. Ensure that your ideas are well-organized and presented in a cohesive manner, with each paragraph or section contributing to the overall argument or discussion.

Evidence-Based Reasoning

Support your arguments and claims with credible evidence. Reference authoritative sources and cite them appropriately to establish the foundation for your ideas. Use empirical data, scholarly research, and reputable references to strengthen the validity and reliability of your work.

Critical Thinking

Academic writing encourages critical thinking and analysis. Engage with the existing literature, identify strengths and weaknesses in the arguments, and develop your own well-reasoned perspective. Challenge assumptions, evaluate alternative viewpoints, and provide well-supported arguments.

Proper Referencing and Citation

Maintain academic integrity by properly referencing and citing all sources used in your writing. Follow the specific citation style required by your academic institution or field, such as APA , MLA , or Chicago style . Accurate referencing gives credit to the original authors, allows readers to verify your sources, and demonstrates your commitment to scholarly integrity.

Revision and Proofreading

Academic writing involves a process of revision and proofreading. Review your work for clarity, coherence, grammar, and spelling errors. Ensure that your writing is free from typographical mistakes and inconsistencies. Seek feedback from peers, instructors, or writing centers to enhance the quality of your work.

Also read: What Is Proofreading And How To Harness Its Benefits?

How To Improve The Academic Writing

To enhance your academic writing skills, it is crucial to engage in regular practice and give careful consideration to various aspects. Here are some essential focal points to pay attention to in order to improve your academic writing:

Punctuation

• Proper use of commas, periods, question marks, and exclamation marks to enhance clarity and meaning in sentences.
• Effective use of semicolons and colons to join related independent clauses and introduce lists or explanations.
• Understanding the role of dashes and hyphens to indicate interruptions or join words in compound adjectives.

Capitalization

• Capitalize proper nouns, including names of people, places, institutions, and specific titles or terms.
• Follow capitalization rules for titles, capitalizing the first and last words, as well as major words within the title.
• Ensure consistency in capitalization within headings and subheadings.

Grammar and Sentence Structure

• Ensure subject-verb agreement, ensuring that the subject and verb agree in number and person.
• Use proper tenses and maintain consistency in verb tense usage within a paragraph or section.
• Write clear and unambiguous sentences, avoiding run-on sentences, fragments, or unclear pronoun references.

Academic Conventions

• Apply appropriate formatting and font style as per the guidelines of the specific academic institution or style guide.
• Use headings and subheadings correctly, following a consistent hierarchy and formatting style.
• Use abbreviations appropriately and consistently, following the accepted conventions in the field.
• Adhere to specific guidelines for tables, figures, and graphs, including proper numbering, labeling, and citation.

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The links in the MLA Style Center reflect MLA Style 9th Edition. 

The links in Purdue OWL reflect MLA Style 9th Edition. 

• Citation Style Chart via Purdue OWL:
• MLA Works Cited: Electronic Sources (Web Publications) Websites, pages on websites, eBooks, images, eArticles, social media...
• MLA Works Cited: Other Common Sources Interviews; speeches, lectures, or presentations; panel discussions; painting, sculpture, or photograph; conference proceedings, song or album; film or movie; podcasts; digital files
• MLA Works Cited Page: Books in Print
• MLA Works Cited Page: Periodicals in Print (Journals, Magazines & Newspapers)
• MLA In-Text Citations: The Basics
• MLA Style Sample Paper
• MLA Style Sample Works Cited
• MLA 9th PowerPoint Presentation

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Why There Are Different Citation Styles – The Art of Referencing

Citation styles are a big deal in the world of higher education. Aspiring writers who want to get their work published, careful students writing their essays and theses, and editors who ensure academic discourse is factual should all consider this.

The publication process might be confusing for those unfamiliar with these stylistic rules. One document sent to several places needs a stylistic tweak with each iteration, changing commas to periods or adding and removing data. It raises an important question: is there a deeper meaning behind this stylistic kaleidoscope, or is it a laborious holdover from academic history? Today, let’s find this out with experts from WriteMyPaper .

Table of Contents

What Are Citation Styles?

The careful craft of citation is vital to the development of academic integrity. These rules specify how the references used in your thought process should be presented. These styles are painstakingly developed by educational institutions , prestigious groups, and well-known publications. They act as a navigator for the incorporation of relevant data. Such a navigator includes the collection of names of the authors, the year of publication, the titles of the works cited, and, occasionally, precise page numbers or URLs that take the reader directly to the source. Depending on the style selected, the order in which this information is shown might change. Certain styles need a set order for the list of writers.

Citation styles also shed light on where these references are located. In-text citations provide the sources you studied a perfunctory mention. On the other hand, bibliographies, which function similarly to extensive catalogs, provide a detailed inventory of all the linked works. These many formats, which demonstrate the vast diversity of academic research, often fall into three main categories: note citations, parenthetical citations, and numerical citations.

Types of citation

Textual citations are the key to unlocking the core of any citation style. Three main approaches are used:

• Parenthetical Citations. The year of publication and the author’s surname are included within the text and separated by parenthesis. If appropriate, a specific page number can also be added to create an author-date system. Sometimes, the author-page format is used instead of the publication date.
• Numerical Citations. This method uses a superscripted or bracketed number that links directly to an entry in the reference list with the same number.
• Note Citations. A superscript number or symbol refers to the full citation inside the text, and they are carefully composed within footnotes or endnotes.

Moreover, the complexities of citation formats also apply to creating reference lists and bibliography entries. The use of italics, element capitalization, and information presentation order all contribute to the subtle differences between these styles. Interestingly, many style guides cover more ground than just citations. They include priceless advice on more general areas of academic writing, such as suitable text layout, grammar, and how to display statistics.

Why There Are Different Citation Styles

Have you ever wondered why there are so many citation styles like APA, MLA, and Chicago? It might seem redundant, but each style serves a specific purpose. Here’s the reason behind the variety:

Discipline or Field

The intellectual environment contains many fields. Each has its unique tapestry of source materials. This fundamental reality is the root of the proliferation of citation styles. This calls for a sophisticated method of referencing. Because of the nature of their raw material, several well-known styles have developed an inextricable bond with particular industries:

• Social sciences. The APA style is the gold standard because of its structure, which is perfect for quantitative research.
• MLA is well-liked in the humanities since its structure goes well with the abundant scholarly and archival materials in these fields.

Although the fundamental components of most styles are always the author, the work’s title, and the year of release, their sequence frequently varies. This illustrates how each discipline emphasizes different facts. For example, the APA style places a high value on the publication date in the reference list. It reflects the importance of being recent in subjects like engineering, social sciences, and education. On the other hand, the humanities elevate authorship by their emphasis on historical study.

For this same reason, the MLA style precedes the author’s name and the publication title within reference entries. The Chicago Manual of Style (CMS) provides more evidence. The notes and bibliography style includes the entire title in footnotes, but the author-date style only consists of the author’s last name and the publication date. These differences between and within styles help to highlight the complex web of scholarly research.

Identity Marker

Let’s go deeper into the complex link between disciplines and citation styles. We might propose that these styles serve as identifiers for those in a particular academic community. Ultimately, researchers on the same subject are inclined to adopt and use the same citation style. They create a feeling of common terminology and approach. The continuous use of a given style denotes the author’s membership in a particular intellectual circle. This is especially noticeable at several UK universities , where students must use pre-existing internal referencing systems.

Acceptance by universities and publication in prestigious journals are, in fact, frequently contingent upon conformity to various styles. Adopting a particular style becomes a kind of initiation into a specific field of study. In addition, many journals and publications purposefully combine a distinctive appearance with a favored citation style to develop a recognizable brand or image.

Tradition plays a vital role here, too. These are the factors shaping preference for citation styles:

• Styles like CMS have a long history, dating to 1906 with The American Economic Review. Using styles like APA and AAA shows respect for those institutions’ histories and contributions.
• Comfort and Reliance. Established styles offer a sense of comfort and reliability. Scholars and researchers know what’s expected and how to use the format, making the process smoother.
• Overlapping functionalities. Over time, most styles have become more similar and can be categorized as the author-date system, footnote citation system, and numerical system.
• Recent trends. There’s a shift towards author-date over footnotes, reflecting a preference for concise data and quantitative studies and increased emphasis on the year of publication.

So, tradition provides a foundation for various citation styles, but it isn’t static. New styles appear, and existing ones adapt to keep pace with the information landscape.

Final Words

Citation styles aren’t just formatting rules. They embody the singular requirements and cultural nuances inherent within distinct research disciplines.

On a broader scale, citation styles serve the overarching purpose of lending uniformity and structure to research across temporal and geographical boundaries. Paradoxically, such a wide variety of styles underscores the inherent diversity within research cultures. The style variations directly correlate with the distinct methodologies, source materials, subject matters, aesthetic presentations, and established traditions employed within each discipline.

The sheer diversity of styles may initially appear overwhelming. Still, it also serves as a testament to the richness of academic inquiry. Perhaps the time is ripe for a reevaluation by academics and publishers, prompting them to consider if their chosen styles genuinely resonate with the evolving needs of their respective fields.

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Hey, I am Azura Everhart a digital marketer with more than 5+ years of experience. I specialize in leveraging online platforms and strategies to drive business growth and engagement.

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How To Cite A TED Talk: APA, MLA and Other Formats

Citing a TED Talk can enhance your research paper by providing unique insights and expert opinions. Whether you’re using APA, MLA, or Chicago style, it’s crucial to format your citations correctly to ensure proper attribution and maintain academic integrity.

This guide will help you navigate the specific citation requirements for TED Talks from different platforms, ensuring you can seamlessly integrate these valuable resources into your work.

Learn how to cite TED Talks accurately in various citation styles with examples and templates.

How To Cite A TED Talk

What’s a ted talk.

TED Talks are a remarkable way to access and share innovative ideas and perspectives from thought leaders around the world. Organised by the non-profit organization TED, these talks cover a wide range of topics, like:

• technology and science,
• social issues.

Twice a year, TED holds conferences where speakers present their insights in captivating and often inspiring talks. These talks are then made available online for free, allowing anyone with internet access to benefit from them.

Volunteers translate the videos, further broadening their reach and making it possible for people around the globe to be inspired regardless of language barriers.

 TED Talks are not just limited to the main TED conferences. Through TEDx, individuals and communities can organize their own TED-style events, focusing on issues that matter locally, free from:

• political, or
• religious agendas.

TED Talks have democratized access to great ideas, ensuring that they are no longer reserved for the literate, educated, rich, or male. They are a powerful tool for education and inspiration, embodying the slogan “Ideas worth spreading.”

Why Do People Cite TED Talks In Research Papers?

There are many reasons authors cite TED talks in their research paper, thesis or dissertation. These include, but not limited to:

• Leveraging the credibility of the speakers
• Leveraging firsthand experiences of the speakers
• Diverse topics
• Multimedia-based evidence

Credibility Of The Speakers

One reason people cite TED Talks in research papers is the credibility of the speakers. TED Talks feature experts and thought leaders who present well-researched and innovative ideas.

If you cite Brené Brown’s TED Talk on vulnerability, you can add substantial weight to a paper on psychology or leadership. 

Leveraging Firsthand Experiences

Access to unique insights and firsthand experiences is another reason. TED speakers often share personal stories and case studies that are not available elsewhere.

If you cite a TED Talk by Jane Goodall, you can provide firsthand insights into primatology and conservation efforts. 

Diverse Topics

The diverse range of topics covered by TED Talks makes them valuable resources for various fields of study. Whether you’re researching:

• technology,
• social issues, or

you can find a TED Talk that fits your topic. 

Multimedia-Based Evidence

Citing TED Talks also provides multimedia evidence that can enhance your paper. Including a specific quote or timestamp from a TED video can support your arguments with engaging and authoritative content.

Whether you’re using a talk from the TED website or YouTube, ensuring accurate references in your bibliography is crucial for credibility and scholarly rigor.

How To Cite A TED Talk In APA Style?

When you cite a TED Talk in APA style, the format depends on whether you watched it on YouTube or directly from the TED website. Each platform affects the citation details, but both require accuracy to ensure proper referencing.

For a TED Talk from YouTube

TED is considered the author since they uploaded the video. Here’s an example template for your reference:

Reference List: TED. (Year, Month Date). Title of the TED Talk [Video]. YouTube. URL

For instance, if you’re citing Brené Brown’s popular TED Talk, your reference would look like this:

TED. (2012, March 16).  The power of vulnerability [Video]. YouTube. https://www.youtube.com/watch?v=iCvmsMzlF7o

In-Text: In-text citations are concise. Use the parenthetical format like this: (TED, 2012).

For a TED Talk from the TED website

If you are citing a TED talk from the TED website, the speaker is the author. The reference format changes slightly:

Reference List: Last name, First initial. (Year, Month Date). Title of the TED Talk [Video]. TED Conferences. URL

For example, citing the same talk by Brené Brown directly from TED’s website, your reference would be: Brown, B. (2010, June). The power of vulnerability [Video]. TED Conferences. https://www.ted.com/talks/brene_brown_the_power_of_vulnerability.

In-Text: In-text citation would be (Brown, 2010).

When you use a direct quote, include a timestamp in your in-text citation. For example, “Vulnerability is the birthplace of innovation, creativity, and change” (Brown, 2010, 5:20).

How To Cite A TED Talk In MLA Style?

When you want to cite a TED Talk in MLA style, the format is straightforward but varies slightly depending on whether you accessed it directly from the TED website or from YouTube.

For a TED Talk on YouTube

When citing a TED Talk from a YouTube video, the format is slightly different. You still list the name of the speaker as the author but need to indicate that the talk is a video and list the publisher as TED Conferences. Here’s the template:

Reference List: Speaker’s Last Name, First Name. “Talk Title.” TED Conferences , Month Year, Video, URL.

For example, citing the same talk from YouTube would be:

Brown, Brené. “The Power of Vulnerability.”  TED Conferences , June 2010, Video, https://www.youtube.com/watch?v=iCvmsMzlF7o.

In-text citations: You only need the speaker’s last name and the timestamp if you’re quoting a specific part of the talk. For example, a quote from Brown’s talk would be cited in-text as (Brown 5:20).

To cite a TED Talk from the TED website, list the speaker as the author, followed by the talk title in quotation marks. Then, include the site name (TED), the month and year of the talk, and the URL. Here’s a template to follow:

Reference List: Speaker’s Last Name, First Name. “Talk Title.” TED , Month Year, URL.

For example, if you want to cite Brené Brown’s TED Talk on vulnerability, your reference would look like this:

Brown, Brené. “The Power of Vulnerability.”  TED , June 2010, https://www.ted.com/talks/brene_brown_the_power_of_vulnerability.

Citation For A TED Talk In Chicago Style

Citing a TED Talk in Chicago style involves a specific format that depends on where you accessed the talk.

Whether you watched it on YouTube or directly from the TED website, it’s crucial to get the details right for both in-text citations and the reference list.

For a TED Talk from the TED website, list the speaker as the author, followed by the title of the talk in quotation marks. Then, include the phrase “TED video,” the month and year of the talk, and the URL. Here’s a template for your reference:

Bibliography: Speaker’s Last Name, First Name. “Talk Title.” TED video, Month Year. URL.

For example, citing Brené Brown’s TED Talk on vulnerability from the TED website would look like this:

Brown, Brené. “The Power of Vulnerability.” TED video, June 2010. https://www.ted.com/talks/brene_brown_the_power_of_vulnerability.

In-text citations: This can be either parenthetical or as footnotes. For a parenthetical citation, you would write (Brown, “The Power of Vulnerability”). For a footnote, it would look like this:

• Brené Brown, “The Power of Vulnerability,” TED video, June 2010, https://www.ted.com/talks/brene_brown_the_power_of_vulnerability.

If you accessed the TED Talk on YouTube, the format is slightly different. You must include “YouTube video” in the reference and list TED Conferences as the publisher. Here’s how you should format it:

Bibliography: Speaker’s Last Name, First Name. “Talk Title.” TED Conferences, Month Year. YouTube video. URL.

For example, citing the same talk from YouTube:

Brown, Brené. “The Power of Vulnerability.” TED Conferences, June 2010. YouTube video. https://www.youtube.com/watch?v=iCvmsMzlF7o.

In-text citations:  In-text citations would follow the same parenthetical or footnote format, adjusting only for the access point. Use (Brown, “The Power of Vulnerability,” YouTube) for parenthetical citations or:

• Brené Brown, “The Power of Vulnerability,” TED Conferences, June 2010, YouTube video, https://www.youtube.com/watch?v=iCvmsMzlF7o.

TED Talk References & In-Text Citation 

Accurately citing TED Talks in your research is essential for credibility and avoiding plagiarism.

Whether using APA, Chicago or MLA format, understanding the correct format for each ensures your references in your research papers are precise and professional. 

By following these guidelines and templates, you can confidently include TED Talks in your work, enriching your research with diverse perspectives and expert insights.

Dr Andrew Stapleton has a Masters and PhD in Chemistry from the UK and Australia. He has many years of research experience and has worked as a Postdoctoral Fellow and Associate at a number of Universities. Although having secured funding for his own research, he left academia to help others with his YouTube channel all about the inner workings of academia and how to make it work for you.

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