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APA Citation Style Guide

A quick guide to using APA citation style

Citing sources in your text

Every time you use an idea that is not your own or information that is not common knowledge in your writing you have to site the source directly in your text.

General Rules:

  • The first time you reference a source use the author(s) last name(s) followed by the publication date in parentheses in your text. 
  • Subsequent uses of the same source should be cited at the end of your sentence by listing the author(s) name(s) and publication date in parentheses.
  • If you use a direct quote from the source include a page number in the parentheses at the end of your sentence. 


   1st use of source:

Ross and Myers (2009) argue that traffic stops deserve more critical attention because of the wide range of privacy rights issues and officer safety issues they can pose. 

   2nd use of source:

Issues surrounding traffic stops require careful Fourth Amendment analysis (Ross & Myers, 2009).

   Direct quote:

Ross and Myers posit that “the touchstone of the Fourth Amendment is reasonableness” and that it has been considered reasonable for police to remove any or all occupants from a vehicle during a traffic stop at their discretion (2009, p. 470).

Citing a source with missing infromation

Source: Lee, C. (2011, January 27). Writing in-text citations in APA style [Blog post]. Retrieved from