APA (7th ed.) Citation

Porter, T., & Gough, M. (2007). How to cheat at Voip security. Syngress.

Chicago Style (17th ed.) Citation

Porter, Thomas, and Michael Gough. How to Cheat at Voip Security. Rockland, MA: Syngress, 2007.

MLA (9th ed.) Citation

Porter, Thomas, and Michael Gough. How to Cheat at Voip Security. Syngress, 2007.