Sturman, C. (1981). Police: An in-depth investigation of a police force in action. Purnell.
Lua i Stíl Chicago (17ú heag.)Sturman, Clive. Police: An In-depth Investigation of a Police Force in Action. Maidenhead: Purnell, 1981.
Lua MLA (8ú heag.)Sturman, Clive. Police: An In-depth Investigation of a Police Force in Action. Purnell, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.