Cita APA (7a ed.)

Walker, B. J., & Blake, I. F. (1977). Computer security and protection structures. Dowden, Hutchinson & Ross.

Cita Chicago Style (17a ed.)

Walker, Bruce J., y Ian F. Blake. Computer Security and Protection Structures. Stroudsburg, Pa: Dowden, Hutchinson & Ross, 1977.

Cita MLA (9a ed.)

Walker, Bruce J., y Ian F. Blake. Computer Security and Protection Structures. Dowden, Hutchinson & Ross, 1977.