APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Hersent, Petit, and Gurle. Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony. Hoboken, NJ: John Wiley, 2005.

MLA (9th ed.) Citation

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

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