Use this format: Author(s). Name of Page. URL. Copyright. Date of posting or revision (if available). Name of organization/institution associated with the site (if available). Date of Access <electronic address>.
Example citation of the page at right:
Alton J. Banks, Matthew S. Bollom, Jon L. Holmes, Jerold J. Jacobsen, John C. Kotz, and John W. Moore. Lithium-Periodic Table Live!. http://www.chemeddl.org/resources/ptl/index.html. Copyright © 1995, 1997, 1999, 2004, 2010 by Division of Chemical Education, Inc. Accessed January 13, 2011.