APA (7th ed.) Citation

Hersent, O., Gurle, D., & Petit, J. (2005). Beyond VoIP protocols: Understanding voice technology and networking techniques for IP telephony. John Wiley.

Chicago Style (17th ed.) Citation

Hersent, Olivier, David Gurle, and Jean-Pierre Petit. Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony. Chcchester, West Sussex, England: John Wiley, 2005.

MLA (9th ed.) Citation

Hersent, Olivier, et al. Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony. John Wiley, 2005.