Security Research Center & Kramen, A. J. (2000). Guide for preventing and responding to school violence. International Association of Chiefs of Police.
Cita Chicago Style (17a ed.)Security Research Center y Alissa J. Kramen. Guide for Preventing and Responding to School Violence. Alexandria, Va: International Association of Chiefs of Police, 2000.
Cita MLA (9a ed.)Security Research Center y Alissa J. Kramen. Guide for Preventing and Responding to School Violence. International Association of Chiefs of Police, 2000.
Precaución: Estas citas no son 100% exactas.