APSA Style Manual
The APSA Style Manual is the premier style manual for the political science discipline. The complete guide is available to download for free on the American Political Science Association website.
This page on the APSA website describes general formatting for reference lists in APSA style along with specific examples by resource type.
Citing Sources Research Guide
General information about avoiding plagiarism, other citation styles (MLA, APA, Chicago), and using Refworks.