Reference Desk 610.902.8537
APA Style from the American Psychological Association is the acceptable citation format for the social sciences. The Sixth Edition was released in 2009. For writing and formatting guidelines, consult the Publication Manual, on reserve at the circulation desk in the library.
The Purdue University Online Writing Lab (OWL) is a great resource when citing soruces with APA style (among others). It not only provides examples in a format and style guide but also gives the theory behind citation styles and why they are used.