Academic writing in political science often uses the American Political Science Association (APSA) style, which is based on the Chicago Manual of Style's author-date format.
The final authority for APSA Style is the Style Manual for Political Science (revised edition, 2006). The final authority for the bibliographic form used in your paper is your professor.
Fish, Stanley. 2001. How Milton Works. Cambridge, MA: Harvard University Press.
Houser, Shelley, Veronica Kessenich, and Kristen Matha. 2002. Quiet Hours: Revealing the Mysteries. Notre Dame, IN: VMS Publishing.
Zagano, Phyllis. 2007. "The Question of Governance and Ministry for Women." Theological Studies 68 (Spring): 348-367.
Writer, Sarah. 2012. "Essay on Chapterhouses: Advancing the Scholarly Discourse." In Discourses on Chapterhouses: A Collection of Essays, ed. Edward Editor. Cambridge, MA: Harvard University Press.
Lawson, Bill. 2011. "Sterba on Affirmative Action, Or, It Never Was the Bus, It Was Us." Journal of Ethics 15 (May): 281-290. Academic Search Premier (September 19, 2012).
Cillizza, Chris. 2009. "Dodd's Troubles Continue." The Fix: Political News & Analysis by Chris Cillizza. 28 July. http://blog.washingtonpost.com/thefix/ (July 29, 2009).
Achbar, Mark and Peter Wintonick. 2002. Manufacturing Consent: Noam Chomsky and the Media. New York: Zeitgeist Video.