Fortuantely the Chicago Manual of Style Online has a quick guide and this has many a good sample citation.
This is the more complex version of Chicago, commonly used in the humanities, notes and bibliography makes use of shortened citations and has slight differences between the formatting of notes vs. with the formatting of a bibliographic entry. Use the Chicago Manual of Style Quick Guide for notes and bibliography citation samples.
This is the 'easiest' version of Chicago and most like other citation styles you may have used like APA and MLA.