Cita APA (7a ed.)

Tupman, B., & Tupman, A. (1999). Policing in Europe: Uniform in diversity. Intellect.

Cita Chicago Style (17a ed.)

Tupman, Bill, y Alison Tupman. Policing in Europe: Uniform in Diversity. Exeter: Intellect, 1999.

Cita MLA (9a ed.)

Tupman, Bill, y Alison Tupman. Policing in Europe: Uniform in Diversity. Intellect, 1999.