Cita APA (7a ed.)

Watson, N. A., & Sterling, J. W. (1969). Police and their opinions. International Association of Chiefs of Police.

Cita Chicago Style (17a ed.)

Watson, Nelson A., y James W. Sterling. Police and Their Opinions. Washington, D.C: International Association of Chiefs of Police, 1969.

Cita MLA (8a ed.)

Watson, Nelson A., y James W. Sterling. Police and Their Opinions. International Association of Chiefs of Police, 1969.