Journal articles: look for "citation tools" or "cite this article" or something along those lines in the database. If the database doesn't offer citation help, you can usually find all of the information (title, author, journal, issue...) at the very top of the article page.
Books: Citation information, such as title, author, publisher, place of publication, and publication date, are available in the record for the book in the library catalog.
Footnote or endnote:
Faulkner, William. Absalom, Absalom!. New York: Vintage Books, 1990.
Article found in an electronic database:
Footnote or Endnote:
1. Henry E. Bent, “Professionalization of the Ph.D. Degree,” College Composition and Communication 58, no. 4 (2007): 141, accessed December 5, 2008, http://www.jstor.org/stable/1978286.
Bent, Henry E. "Professionalization of the Ph.D. Degree.” College Composition and Communication 58, no. 4 (2007): 0-145. Accessed December 5, 2008. http://www.jstor.org/stable/1978286.