APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.