Cita APA (7a ed.)

Behrens, T., Riley, C., & Khan, U. (2005). Cisco PIX firewalls: Configure, manage, & troubleshoot. Syngress Pub..

Cita Chicago Style (17a ed.)

Behrens, Thorsten, Charles Riley, y Umer Khan. Cisco PIX Firewalls: Configure, Manage, & Troubleshoot. Rockland, Mass.: Syngress Pub., 2005.

Cita MLA (8a ed.)

Behrens, Thorsten, et al. Cisco PIX Firewalls: Configure, Manage, & Troubleshoot. Syngress Pub., 2005.