Articles from the reference books and databases can be complicated to cite. In many cases, you are creating a citation within a citation within a citation. For example, your critique may have been originally published in a journal, which is then reprinted in a book, which is then made available online in a database. In that case, you need to cite the original publication information, as well as the book it was reprinted in, and the library database from which it was accessed.
We recommend using a number of helpful publications from Purdue OWL (Online Writing Lab):
MLA Quick Sheet from Purdue OWL: Use this page as a quick reference for your basic MLA formatting (7th ed.).
MLA Sample Paper: Includes numerous notes on layout and formatting (8th ed.)
MLA Formatting: The Basics - Vidcast: Purdue OWL has a short 3 minute video on YouTube which covers using Microsoft Word 2007 for formatting your paper.