Serial killer executed by injection in Illinois. Deseret News, 10 May 1994. Artikkelin verkkoversio. Viitattu 12 February 2010. Arkistoitu 1 joulukuu 2011.
Serial killer executed by injection in Illinois. Deseret News, 10 May 1994. Artikkelin verkkoversio. Viitattu 12 February 2010. Arkistoitu 1 joulukuu 2011.
Weatherby, Georgie Ann & Buller, Danielle M. & McGinnis, Katelyn: The Buller-McGinnis Model of Serial Homicidal Behavior: An Integrated Approach. Journal of Criminology and Criminal Justice Rechearch & Education, 2009, 3. vsk, nro 1. Arkistoitu 13.6.2010. (englanniksi)