The Chicago and Turabian Styles, published by the University of Chicago Press, commonly are used for undergraduate History, Philosophy, Political Science, and Religious Studies, as well as other disciplines. Check your syllabus and/or with your professor regarding specific style requirements for your assignment.
Turabian, Kate L. A Manual for Writers of Research Papers, Theses, and Dissertations. 7th ed.REF.LB2369 .T8 2007University of Chicago Press. The Chicago Manual of Style. 16th ed.REF. Z253 .U69 2010