Chesshyre, R. (1989). The Force: Inside the Police. Sidgwick & Jackson.
Lua i Stíl Chicago (17ú heag.)Chesshyre, Robert. The Force: Inside the Police. London: Sidgwick & Jackson, 1989.
Lua MLA (8ú heag.)Chesshyre, Robert. The Force: Inside the Police. Sidgwick & Jackson, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.