APA (7th ed.) Citation

Zwicky, E. D., Chapman, D. B., & Cooper, . S. (2000). Building internet firewalls (2nd ed.). O'reilly.

Chicago Style (17th ed.) Citation

Zwicky, Elizabeth D., D. Brent Chapman, and Simon Cooper. Building Internet Firewalls. 2nd ed. Beijing: O'reilly, 2000.

MLA (8th ed.) Citation

Zwicky, Elizabeth D., et al. Building Internet Firewalls. 2nd ed. O'reilly, 2000.