Bluebook: A Uniform System of Citation : Compiled by the editors of the Columbia Law Review , the Harvard Law Review , the University of Pennsylvania Law Review …, and The Yale Law Journal --the Bluebook is the major resource for legal publications and citation. In addition to purchasing online access or a print copy from Harvard, Peter W. Martin of Cornell, provides a free online Basic Legal Citation manual. .
Chicago/Turabian : The Chicago Manual of Style is the "grandparent" of the genre and remains the leader with special applicability for the publishing industry, History, and much of the Humanities. .
MLA : The Modern Language Association is a relatively modern method that is frequented by Literature and Writing Departments. This information is located in the online library on the home page you click Information Literacy then Styles manuals. ( Full Answer )