APA Formatting and Style Guide from Purdue's Online Writing Lab (OWL).
Brief APA (American Psychological Association) tutorials to using APA style.
APA Style Blog The official companion to the Publication Manual of the American Psychological Association, 6th ed. It's run by a group of experts who work with APA Style every day.
Quick guide to APA style from the Writing Center at the University of Wisconsin-Madison.
APA Exposed: Everything You Wanted to Know About APA Formatting but Were Afraid to Ask A thorough video tutorial on APA citation created by Wendy K. Mages, Ed.D at Harvard University.
These online citation managers offer a convenient way to organize and keep track of your references.
EasyBib Free, automatic bibliography and citation maker.