Cita APA (7th ed.)

Hill, D. A., & Rockley, L. . . . . . . . . E. (1981). Security: Its management and control. Business Books.

Cita Chicago (17th ed.)

Hill, Denys A., i L E. Rockley. Security: Its Management and Control. London: Business Books, 1981.

Cita MLA (9th ed.)

Hill, Denys A., i L E. Rockley. Security: Its Management and Control. Business Books, 1981.