Cita APA (7a ed.)

Poyner, B., & Warne, C. (1988). Preventing violence to staff (1. publ.). HMSO.

Cita Chicago Style (17a ed.)

Poyner, Barry, y Caroline Warne. Preventing Violence to Staff. 1. publ. London: HMSO, 1988.

Cita MLA (9a ed.)

Poyner, Barry, y Caroline Warne. Preventing Violence to Staff. 1. publ. HMSO, 1988.