APA (7th ed.) Citation

Chapman, S. G. (1998). Murdered on duty: The killing of police officers in America (2. ed.). Thomas.

Chicago Style (17th ed.) Citation

Chapman, Samuel G. Murdered on Duty: The Killing of Police Officers in America. 2. ed. Springfield, Ill: Thomas, 1998.

MLA (8th ed.) Citation

Chapman, Samuel G. Murdered on Duty: The Killing of Police Officers in America. 2. ed. Thomas, 1998.