APA Style (6th ed.)

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An e-book retrieved from an academic database that does not have a DOI (Digital Object Identifier) is referenced as though it were the print version, as above. (A DOI is a unique alphanumeric string that identifies content and provides a persistent link to its location on the internet. DOIs can be found in database records and the reference lists of published works).

Books with a URL or a DOI can be referenced like this:

Book Chapter

Journal article (print)

Journal article (database without DOI)

Journal articles retrieved from databases without a DOI can be referenced like a print journal, as above.

Journal article (with DOI)


Journal article (more than 7 authors)

List the first six authors followed by three spaced ellipsis points (. ) and then the last author's name.

Journal article (pre-publication)

“Pre-print”, “In press” and “advanced online publication” usually refer to articles that have been accepted for publication, but may not yet have been assigned to a publication volume/issue. These articles can be cited using the year of online publication and the DOI.


arXiv is a collection facility for scientific 'e-prints'. Some of them have been published and some have not. APA recommends updating your references when you're close to finishing your assignment. If you've cited a preprint that has since been published, cite the published journal article.

In the example below, you will see that the title is in italics. This is because it hasn't yet been accepted in a journal and is, therefore, considered a stand-alone work.

Journal Article (with article numbers, not page numbers)

If the journal article has an article number instead of a page range, include the word “Article” and then the article number instead of the page range.


Magazine Article

Webpage

If no date can be established, use n.d. to indicate no date in the citation and the reference.

Blog

Twitter

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LinkedIn Profile

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TikTok

Wikis

Wikipedia is a free online encyclopaedia, created and edited by volunteers around the world. It is not a scholarly source, so your lecturer may not be happy for you to use it as a source in your assignments. Scholarly assignments should generally rely on peer-reviewed and other scholarly work vetted by experts in the field. However, it may be a good starting point for you in your research to find citations to original source materials that you do want to use.

Wikipedia is a constantly changing site, so cite an archived version of the page, if you can (select 'view history' and then the date of the version you used). If it doesn't have a permanent link to an archived version of the page, include a URL for the entry and the retrieval date. The retrieval date is always required because the source material may change over time. 'n.d.' is an abbreviation of 'no date' and it is used as Wikipedia is constantly changing.