This assignment requires you to use a citation style determined by the Political Science Department based on the fifteenth edition of The Chicago Manual of Style (Chicago: University of Chicago Press, 2003) as is detailed here or download below.
Purdue OWL - great website for formatting examples
Again, your citation style for this paper is one determined by the Political Science department itself, but it is based on the Chicago Style. If you are unsure about a particular source as detailed in the department style guide, you can cross reference with the Purdue OWL's resources above.