Using American Psychological Association (APA) Format
http://owl.english.purdue.edu/handouts/research/r_apa.html

Purdue University

Abstract:

For the most current information about APA Format, we recommend visiting the Author's Corner of the APA website, where you can read about electronic reference formats recommended by the American Psychological Association and some frequently asked questions about the APA Publication manual, which includes the most up to date information about formatting, citation, and style. This handout is currently being revised to be in accordance with the latest guidelines, so do make sure to check our information against theirs.