Cita APA (7a ed.)

Porter, T. (2006). Practical VoIP security. Syngress Pub..

Cita Chicago Style (17a ed.)

Porter, Thomas. Practical VoIP Security. Rockland, MA: Syngress Pub., 2006.

Cita MLA (8a ed.)

Porter, Thomas. Practical VoIP Security. Syngress Pub., 2006.