"Checklist of Characteristics of Youth who have caused school-associated violent deaths" 1998. www.nssc1.org/reporter/checklist.htm October 31, 1999.
Cisneros-Consford, Anastasia Well Off Kids Just As Prone To Violence The News 5 June 1999.
Clinton, Hillary Rodham We must Police the Media in order to Curb Violence The News 5 June 1999.
Clinton Unveils TV Ads to Combat Violent Crime The News 18 August, 1999.
Garbarino, James. Lost Boys: Why Our Sons Turn Violent And How We Can Save Them. New York: The Free Press, 1999.
Golden, Frederic The First Chimpanzee Time (February 8th, 1999) pp. 30-31 Park, Alice.
Jonathan Hail speaks with All Things Considered [19990421_atc_10.ram] Available www.npr.org/ramfiles/atc/19990421.atc.10.ram August 22, 1999.
Niehoff, Debra. The Biology of Violence: how understanding the brain, behavior, and environment can break the vicious circle of aggression. New York: The Free Press, 1999.
Peterson, Dale and Wrangham, Richard. Demonic Males: Apes And The Origin Of Human Violence New York: Mariner Books, 1996.
Puig, Claudia Hollywood Examines It's Soul USA Today 7 June 1999.
Rodgers, Patrick Enough already People (July 12th, 1999) pp73-74 Shepardson, David.
School Violence Drills Urged Oakland Free Press 5 August 1999.
Skinner B.F. About Behaviorism New York: Vintage Books Addition, 1976.
"Unnatural Disasters: The Shooting in Texas" 1999 www.familyeducation.com/article/1,1120,1-9441,00.html November 1, 1999.