Boyd, David G. (1995). On the cutting edge: law enforcement technology. The FBI Law Enforcement Bulletin, 7/1/1995.
Dempsey, Tom, Department of Government and Public Affairs, & Newport News. (1997, November 1). Computer Communications Technology Facilitates Law Enforcement. Retrieved September 16, 2004, at http://www.iacptechnology.org/Library/ComputerTraining.htm
Division of Emergency Communications. (n.d.). Captain Linda Samuel. Retrieved September 16, 2004, at http://www.ci.richmond.va.us/department/police/Chief/pdxxs_DEC.asp
Richmond Police Department. (n.d.). Richmond Police Department. Retrieved September 16, 2004, at http://www.richmondgov.com/department/police/pdxxi_index.asp