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AJP Style

This guide provides information and examples (in-text, references, and formatting) to help you cite sources in AJP style. Why cite? Citing sources gives credit to the author(s) whose work you used to support your research.

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Video Tutorial: AJP In-Text Citations and References

About AJP Style

The Kinesiology program at the University of Guelph-Humber follows the citation guidelines provided by the American Physiological Society's American Journal of Physiology. Your professor may require variations on the official style. Please consult your professor for citing requirements for your assignments and essays to avoid any confusion.

All citation examples in this LibGuide have been taken from the updated American Physiological Society website

General Rules - Citations

In scientific literature, you will only be paraphrasing your sources (using your own words to express the author's ideas) when doing in-text citations as opposed to using direct quotations. Do not use quotation marks or include the page number in the in-text citation. 

AJP References

According to the American Physiological Society:

“Reference lists for all APS journals should be arranged by order of in-text citation and numbered serially. The reference number should be placed in parentheses at the appropriate place in the text.” (1).

AJP requires you to list every single author instead of using the term ‘et al’. The one exception to this rule is if there is an inclusive name for the research group as a whole. In this case, the research group can be used as the author name in your citation (2).


1. Villalobos AR, Parmelee JT, Renfro JL. Choline uptake across the ventricular membrane of neonate rat choroid plexus. Am J Physiol Cell Physiol 276: C1288-C1296, 1999.

2. Other-Author AA. 2021. References [Online].  American Physiological Society. [13 Sept. 2021].

3. International Author Association. 2021. Example References [Online].  American Physiological Society. [13 Sept. 2021].

Please note: neither of these web pages actually have author attribution; names have been created for illustrative purposes.  Please note the use of quoting and paraphrasing in the examples above. 


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