Sturman, C. (1981). Police: An in-depth investigation of a police force in action. Purnell.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSturman, Clive. Police: An In-depth Investigation of a Police Force in Action. Maidenhead: Purnell, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSturman, Clive. Police: An In-depth Investigation of a Police Force in Action. Purnell, 1981.
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