Cita APA (7a ed.)

Porter, T. (2006). Practical VoIP Security. Syngress Publishing.

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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