In most databases, you will find all the elements of the citation, but not necessarily in the correct Chicago order or format. You will also find some information you don't need, such as the presence of illustrations or the number of pages in the article. Note the information you need and create a citation following this example.
Geraghty, Lincoln. "Creating and Comparing Myth in Twentieth-Century
Science Fiction: Star Trek and Star Wars." Literature Film Quarterly
33, no. 3 (July 2005): 191-200. http://search.ebsco.com (accessed Nov. 4, 2009)