Sturman, C. (1981). Police: An in-depth investigation of a police force in action. Purnell.
Chicago-referens (17:e uppl.)Sturman, Clive. Police: An In-depth Investigation of a Police Force in Action. Maidenhead: Purnell, 1981.
MLA-referens (8:e uppl.)Sturman, Clive. Police: An In-depth Investigation of a Police Force in Action. Purnell, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.