Use reliable Internet sources to find answers to your questions about APA citation style:

American Psychological Association (APA)
http://www.apastyle.org/learn/faqs/index.aspx

Purdue University Online Writing Lab – APA Style Guidelines
http://owl.english.purdue.edu/owl/resource/560/01/

Research and Documentation in the Electronic Age, by Diana Hacker and Barbara Fister.
http://www.dianahacker.com/resdoc/p04_c09_s2.html

 

Powerpoint Presentations:

APA Citation Style: How to Format Your Paper