Your instructor requires the use of the Chicago Manual of Style when citing your sources. However, you may also use Kate Turabian's A Manual for Writers of Research Papers, Theses and Dissertations, which is a simplified version of the Chicago Manual.
The Bluebook: A Uniform System of Citation is the standard for citing legal information correctly. You can find a print copy behind the Central Reference Desk under the call number KF 245 .B58 (Ref).
The Writing Lab at Purdue University guides students in the use of the writing style guides. Be sure and visit their site once you have put your own citations into the proper format to see check your work.