(1973). Law enforcement officers killed and assaulted: Summary. US Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Law Enforcement Officers Killed and Assaulted: Summary. Washington, DC: US Gov. Print. Off, 1973.
MLA-Zitierstil (8. Ausg.)Law Enforcement Officers Killed and Assaulted: Summary. US Gov. Print. Off, 1973.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.