Cita APA (7a ed.)

Hain, P., & Humphry, D. (19). Policing the police. Calder.

Cita Chicago Style (17a ed.)

Hain, Peter, y Derek Humphry. Policing the Police. London: Calder, 19.

Cita MLA (9a ed.)

Hain, Peter, y Derek Humphry. Policing the Police. Calder, 19.