Answered By: Sandy Marinaro
Last Updated: Apr 14, 2015     Views: 4

You didn't mention what citation style you're using.  If it's APA, their blog has a nice post on this question that includes examples:

Secondary Sources (aka How to Cite a Source You Found in Another Source)

University of Maryland University College also has examples on their APA page.  Look for

Citing a Source within a Source (Publication Manual, p. 178) in the menu in the upper right.

 

If you're using MLA, the University of Maryland University College also has an MLA page with an example of
Citing a Source within a Source , again linked from the menu in the upper right.

As the blogpost indicates, it's generally preferable to use the original source, no matter which style you're using. If you need help finding the original article (or if you're using some style other than APA or MLA), please feel free to get back to me with the details.