Spree killer (English Wikipedia)

Levinson, David (ed.): Encyclopedia of Crime and Punishment, Vol. 4; Berkshire Publishing Group, 2002. p. 1565
Douglas, John E. & Olshaker, Mark: The Anatomy of Motive; Simon and Schuster, 1999.
Levin, Jack & Fox, James Alan: Mass Murder: America's Growing Menace, Berkley Books, 1991.
Fuller, John R. & Hickey, Eric W.: Controversial Issues in Criminology; Allyn and Bacon, 1999. pp. 36.
Holmes, R. M, & Holmes, S. T.: Serial Murder; SAGE Publications, 2010. pp. 35.
Holmes, R. M, & Holmes, S. T.: Serial Murder; SAGE Publications, 2010. pp. 36.
Holmes, R. M, & Holmes, S. T.: Serial Murder; SAGE Publications, 2010. pp. 6.

fbi.gov (Global: 881^st place; English: 611^th place)

Zawitz, Marianne W., ed. (1988). Report to the Nation on Crime and Justice (PDF) (2nd ed.). Bureau of Justice Statistics. p. 4. Archived (PDF) from the original on August 7, 2021. Retrieved July 20, 2023.

Zawitz, Marianne W., ed. (1988). Report to the Nation on Crime and Justice (PDF) (2nd ed.). Bureau of Justice Statistics. p. 4. Archived (PDF) from the original on August 7, 2021. Retrieved July 20, 2023.
Charalambous, Nick; Dillman, Meryl (December 17, 2006). "No evidence of spree killer yet, police say". The Anderson Independent-Mail. Anderson, South Carolina. Archived from the original on December 30, 2008. Retrieved July 8, 2008.