Cita APA (7a ed.)

Hemphill, C. F., & Hemphill, R. W. (1979). Security safeguards for the computer (3. pr.). American Management Assoc.

Cita Chicago Style (17a ed.)

Hemphill, Charles F., y Robert W. Hemphill. Security Safeguards for the Computer. 3. pr. New York: American Management Assoc, 1979.

Cita MLA (8a ed.)

Hemphill, Charles F., y Robert W. Hemphill. Security Safeguards for the Computer. 3. pr. American Management Assoc, 1979.