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A reference is the specific information given to properly credit the source of any content, idea or data used in your work (e.g., a book, an article or a direct quote).
When you use another person's words in your work—whether you are quoting them directly or paraphrasing them indirectly—it is essential to indicate to the reader that the text did not originate with you. This respects intellectual property and prevents plagiarism. Several referencing techniques are available.
Whether you are quoting or paraphrasing another person’s words, you are using someone else’s words. It is essential to indicate that these are not your own words. This respects intellectual property and prevents plagiarism.
To do so, several referencing techniques are available. Here are some of the most common ones.
An in-text citation is a brief reference inserted directly into the body of a text. It is placed directly after the text that is being referenced.
The most common in-text citation is the parenthetical citation and uses the following formats.
| Type of reference made | Format to use |
| Referencing an idea | (Author, date) |
| Referencing an entire book | |
| Paraphrasing without directly quoting | |
| Directly quoting | (Author, date, page number*) |
| Borrowing from |
*Use the abbreviations “p.” for 1 page or “pp.” for page range.
When pages aren’t numbered, use “Chapter”, “para.” for a single paragraph or “paras.” for multiple paragraphs.
The other type of in-text citation is the narrative citation. It is used when the name of the author is integrated as part of a sentence and uses the following formats.
| Type of reference made | Format to use |
| Referencing an idea | Author (date) |
| Referencing an entire book | |
| Paraphrasing without directly quoting | |
| Directly quoting | Author (date) quote/borrowed material (page number) |
| Borrowing from |
Parenthetical citation
We all knew wombats were amazing, but little could we suspect that they could “form nearly perfect cubes up to 100 times a night” (Robertson, 2021, p163).
Narrative citation
After sharing his discovery, Robertson (2021) was confronted by his peers, but eventually managed to come out of the situation smelling like roses.
With parenthetical citations, repeat the full citation (author, date).
With narrative citations, only include the full citation (author, date) the first time it is used in a paragraph.
The abbreviation “ibid.” is not used in the APA Style.
Parenthetical citation
Various animal encounters described in the book are hard to believe. Take for instance the case of the miniature komodo dragon (Robertson, 2013, pp. 65-72) which was later identified as a common garden skink (Lampropholis guichenoti).
Narrative citation
There are many examples of Robertson (2013) letting his imagination get the better of him, especially the giant koala, the hopping dingo and the 3-legged wallaby that were the result of him observing animals without his glasses.
When using parenthetical citations: (AI company name, year)
When using narrative citations: AI company name (year)
Parenthetical citation
The wombat’s diet is mostly plant-based (Open AI, 2023).
Narrative citation
According to Open AI (2023), the wombat’s diet is mostly plant-based.
Be careful when citing AI.
To know more about AI and why it's important to stay critical when using it as a source of information, take a look at our AI-related resources:
A reference list is a dedicated section that provides the full, detailed bibliographic information for every source you have cited in the body of a text. It is generally placed at the end of the text. The list is alphabetized using the first letter of the author’s names.
The format is as follows:
Author’s last name, first name initials (copyright year). Book titles (edition and volume). Publisher. DOI or URL
DOI vs URL
DOI: A unique identifier assigned to an intellectual property, presented in the form of a hyperlink that is permanent.
URL: A web address that specifies the location of a digital resource on the internet.
If a source has a DOI, no need to cite the URL. Use the URL when a source doesn't have a DOI.
Robertson, B. (2016). Tales of a Retired astronaut: visiting the animal world (1st ed.). Lunar Publishing. https://doi.org/10.1000/182
Whowar, U. (2003). Guide to naming new discoveries for dummies (3rd ed.). Watsytt Kald Press. https://www.alloprof.qc.ca/en/students/vl/sciences/chemical-nomenclature-s1114
Different types of sources require different types of references.
Here are some of the most common instances you will come across.
To cite articles in periodicals, use the following format:
Author’s last name, first name initial, author 2’s last name, first name initial & author 3’s last name, first name initial (Year). Title of article. Title of periodical, volume number (issue number), page numbers. DOI or URL
Skold, U. C. & Beelozeer, O. (1998). It’s Cold Outside. Warm wintery weather weekly, vol. 2 (issue 19), p. 273. https://doi.org/10.1000/182
To cite a dictionary, a thesaurus or an encyclopedia, use the following formats:
When written by a group of authors or an organization:
Institution or organization name. (Year). Title of entry. In title of referenced work (edition, page numbers). Publisher.
When written by an individual author:
Author’s last name, First name (Year) Title of entry. In Editor name (ed.), Title of referenced work (edition, page numbers). Publisher.
Group of authors or organization
Wordy McWords, Incorporated. (2007). “How to build words using letters.” In Wordy mcwords wordy encyclopedia (7th ed., pp.180-187). Lengthy Books Publishing.
Individual author
Writewell, O. K. (2011). “To be at the spelling bee.” In S. P. Elitt (ed.), Spelling it out (3rd ed., pp. 333-347). S. P. Ellit and co Publishing.
To cite an edited book, use the following formats:
Basic format:
Author’s last name, first name initials (year of publication). Title of work: Capitalized first word in subtitle too. Publisher. DOI (if available)
Edited book with no author:
Editor’s last name, first name & editor 2’s last name, first name (Eds.). (year of publication). Title of work: Capitalized first word in subtitle too. Publisher. DOI (if available)
Translated edited book:
Author’s last name, first name initials (year of publication). Title of work: Capitalized first word in subtitle too (Translator’s first name initials and last name, Trans.). Publisher. (Original work published year) DOI (if available)
Basic format:
Looken, C. (1978). Visual storytelling anthology: What you can’t see. Spectacles Publisher. https://www.alloprof.qc.ca/en/students/vl/sciences/eyes-and-vision-s1288
Edited book with no author:
Guykant, C. & Neitherkan, I. (Eds.). (2000). Wearing glasses: Tales of the unseen. Myopic Publishing. https://doi.org/10.1000/182
Translated edited book:
Griffin, J. (1897). Can you see me? (N. Owakent, Trans.). Wells Publishing. (Original work published 1896)
When citing works by multiple authors, use the following formats:
For 2 authors:
List the authors’ last names and initials, separating them with a comma and an ampersand “&.”
For 3 to 20 authors:
List the authors’ last names and initials, separating them with a comma, separating the last name with a comma and an ampersand “&.”
For more than 20 authors:
List the authors’ last names and initials, separating them with a comma. After the 19th name, use an ellipsis “...” and end with the final author name.
For group authors with no single identifications:
Use the name of the group instead of the authors’ names.
For 2 authors:
Furstfell, O., & Deotherg, I. (2022). Tea for two tomorrow too. Seconds Press.
For 3 to 20 authors:
Firstguy, A, Secondfellow, B., Thirdbody, C., Fourthmate, D., Fifithdude, E., & Sixthsir, F. (2020). Crowded teahouse troubles. Lotso Publisher.
For more than 20 authors:
Fellofurst, A., Secondllady, B., Thirdude, C., Sirfourth, D., Fifthdame, E., Matesixth, F., Seventhbro, G., Lasseighth, H., Ninthchap, I., Tenthlad, J., Bustereleventh, K., Misstwelvth, L., Thirtheenthbody, M., Manfourteenth, N., Chummyfifteenth, O., Sixteenthpardner, P., Mickeyseventeen, Q., Majorityeighteenth, R., Nineteenthmiz, S., … Finaldude, Z. (1999). Finding a less crowded teahouse is essential. Too Many Publishing.
https://doi.org/10.1000/182
For group authors with no single identifications:
Tea Testers’ Association. (2001). Thirsty for tasty tea. Earl Grey Publishing.
https://www.alloprof.qc.ca/en/students/vl/sciences/concentration-s1035
When citing webpages, use the following formats:
When the author's name is available:
Author’s last name, first name initials (year, month day). Title of page. Site name. URL
When only a group name is available:
Group name (year, month day). Title of page. Site name. URL
When no authors’ or groups are named:
Title of page (year, month day). Site Name. Retrieved month day, year, from URL
*The Retrieved date is the date when you used the webpage.
When the author's name is available:
Hugh, R. L. (2023, November 31). Using dates the right way. World Calendar. http://worldcalendar.notarealsite/no-point.in.clicking.com
When only a group name is available:
Sand Appreciation Group (2002, May 16). It does get everywhere. Ani’s Altruistic Reviews. http://anisatruisticreviews/idontlikesand.stillnota.real.site/or.reason.com
When no authors’ or groups are named:
Well done but not burnt (2005, May 19). Cooking on Charcoal. Retrieved January 5, 2025, from http://cookingoncharcoal.highground/dontdoit.stillnot/a.realsite.com
When citing generative AI, use the following format:
AI Company Name. (year, month day). Title of chat [Description of AI tool]. Tool Name/Model. Chat URL
Anthropic. (2025, November 25). The answer to the world, the universe and everything in short [Generative AI]. Claude Sonnet 4.5. https://claude.ai/share/notarealchat/so/dontbother.42
When citing audiovisual media, use the following formats:
Film & video
Director’s last name, first name initials (Director). (Date of publication). Title of film or video [Film]. Production company.
Film & video in another language
Director’s last name, first name initials (Director). (Date of publication). Title of film or video in original language [Translated Title] [Film]. Production company.
TV show or series
Executive Producer’s last name, first name initials (Executive Producer). (Airing dates). Title of show or series [TV series]. Production company(s)
TV show or series episode
Writer’s last name, first name initials (Writer), & Director’s last name, first name initials (Director). (Original airing date). Title of episode (season/series number, episode number) [TV series episode]. In Executive Producer’s first name initials full last name (Executive Producer), Series title. Production company.
Video hosting websites (YouTube, Dailymotion, Vimeo…)
Uploader name. (Date of publication). Title of Video [Video]. Website host. URL
Music album
Artist name. (year of release). Title of album [Album]. Record label.
Single song or track
Artist name. (year of release). Title of song/track [Song]. Title of album [Album]. Record label.
*When citing a classical piece of music, list the composer instead of the recording artist.
Podcast
Executive Producer’s last name, first name initials (Executive Producer). (Airing dates). Title of podcast [Audio podcast]. Production company. URL
Podcast episode
Executive Producer’s last name, first name initials (Executive Producer). (Airing date). Title of podcast episode (Episode number) [Audio podcast episode]. Title of podcast. Production company. URL
Artwork in a museum or a museum website.
Artist’s last name, first name initials (year of release). Title of artwork [medium]. Name of museum, City, State/Province, Country, URL of museum
*When a cited art piece doesn’t have a title, provide a brief description in square brackets [description].
Photograph (not associated with a museum)
Photographer’s last name, first name initials (year of publication). Title of photograph [Photograph]. Source. URL
Film & video
Smithee, A. (Director). (2024). Scheme 10 from beyond the galaxy [Film]. E. Davis Studios.
Film & video in another language
Largo, E. (Director). (1965). Il fantastico disco volante [The amazing flying saucer] [Film]. Spettro Produzion.
TV show or series
Mulder, F. (Executive Producer). (2019-present). The truth is out there [TV series]. X-Studios.
TV show or series episode
Langly, R. (Writer), & Frohike, M. (Director). (1994, November 21). An alien stole my keys (Season 1, Episode 17) [TV series episode]. In J. F. Byers (Executive Producer), Suspect Files. Veracity Production.
Video hosting websites (YouTube, Dailymotion, Vimeo…)
Dana. (2022, September 30). I don’t believe any of it [Video]. YouTube. https://www.youtube.com/watch?=n0t-4/r3al
Music album
Astronaut Bob. (2021). Cats on the moon [Album]. Moonbase Records.
Single song or track
Astronaut Bob. (2021). They stole my moon buggy [Song]. Cats on the moon [Album]. Moonbase Records.
Podcast
Wood, E. (Executive Producer). (2015-2023). B-movie chronicles [Audio podcast]. Good Enough Studio. http://www.bmovieschroniles/made-up.n0t-r3al.com
Podcast episode
Wood, E. (Executive Producer). (2021, December 1). One-take wonder (No. 81) [Audio podcast episode]. In B-movie chronicles. Good Enough Studio. http://www.bmovieschroniles/e81/made-up.n0t-r3al.com
Artwork in a museum or a museum website.
Neary, R. (1977). Mashed potato tower [Clay]. Dreyfuss Museum of Modern Art, Muncie, Indiana, United States. http://www.dmma.artwork/771116-potatotower/made-up.n0t-r3al.com
Photograph (not associated with a museum)
Bradbury, R. D. (2007). Little red planet [Photograph]. Proxima Centauri Journal. http://www.pcj/image-1920/little-red-planet-/archive/n0t-r3al.org