Chapman, B. D., & Zwicky, E. D. (1995). Building internet firewalls. O'Reilly & Associates.
芝加哥风格引文Chapman, Brent D., 与 Elizabeth D. Zwicky. Building Internet Firewalls. Sebastopol Calif: O'Reilly & Associates, 1995.
MLA引文Chapman, Brent D., 与 Elizabeth D. Zwicky. Building Internet Firewalls. O'Reilly & Associates, 1995.
警告：这些引文格式不一定是100％准确.