Cita APA (7a ed.)

Chapman, B. D., & Zwicky, E. D. (1995). Building internet firewalls. O'Reilly & Associates.

Cita Chicago Style (17a ed.)

Chapman, Brent D., y Elizabeth D. Zwicky. Building Internet Firewalls. Sebastopol Calif: O'Reilly & Associates, 1995.

Cita MLA (9a ed.)

Chapman, Brent D., y Elizabeth D. Zwicky. Building Internet Firewalls. O'Reilly & Associates, 1995.