Cita APA (7a ed.)

Police Foundation, USA, & Police Foundation. (1990). Drugs and violence: Police departments under siege; integrated community drug control strategies. Police Foundation.

Cita Chicago Style (17a ed.)

Police Foundation, USA, y Police Foundation. Drugs and Violence: Police Departments Under Siege; Integrated Community Drug Control Strategies. Washington, DC: Police Foundation, 1990.

Cita MLA (8a ed.)

Police Foundation, USA, y Police Foundation. Drugs and Violence: Police Departments Under Siege; Integrated Community Drug Control Strategies. Police Foundation, 1990.