You can visit the American Law Institute (ALI) Web site at http://www.ali.org/.
You can visit the Cornell Law School Web site at http://www.law.cornell.edu/topical.html for an overview of agency law.
An overview of agency law is available at 'Lectric Law Library, http://www.lectlaw.com/d-a.htm, under the letter A for Agent.
The College of William and Mary Employee Policy Manual is available at http://www.dhrm.state.va.us/hrpolicy.htm.