Hill, D. A., & Rockley, L. . . . . . . . . E. (1981). Security: Its management and control. Business Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHill, Denys A., और L E. Rockley. Security: Its Management and Control. London: Business Books, 1981.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHill, Denys A., और L E. Rockley. Security: Its Management and Control. Business Books, 1981.
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