Cita APA (7a ed.)

Fein, R. A., & Vossekuil, B. (1998). Protective intelligence and threat assessment investigations: A guide for state and local law enforcement officials. US Dep. of Justice, Office of Justice Programs.

Cita Chicago Style (17a ed.)

Fein, Robert A., y Bryan Vossekuil. Protective Intelligence and Threat Assessment Investigations: A Guide for State and Local Law Enforcement Officials. Washington, DC: US Dep. of Justice, Office of Justice Programs, 1998.

Cita MLA (9a ed.)

Fein, Robert A., y Bryan Vossekuil. Protective Intelligence and Threat Assessment Investigations: A Guide for State and Local Law Enforcement Officials. US Dep. of Justice, Office of Justice Programs, 1998.