Zotero and Mendeley are free resources that let you save, cite and manage just about any format of information.  You can create separate folders for your research and, since it is hosted remotely, you can access it anywhere, and create bibliographies in a wide range of citation styles.  Click on the link below to download the program.

The 16th edition of the Chicago Manual of Style is the most recent and comprehensive. 

You can refer to a print copy of:

The Chicago Manual of Style, 16th ed., 2010. (Z253 .U69 2003 (Ref)

Held at the Research Help Desk (Kennedy 2nd floor) and on Permanent Reserves, for Library-use Only.

Harvard Style is a Relative Newcomer to the Citation Style Wars.

You should study this link, and scroll through it to learn what the style requires, and what it looks like.  If the citation you have is not covered by this style sheet, you should ask your professor or consult the Chicago Manual of Style. (See box on left.)

Guideliness to IS or "Harvard" style