APA (7th ed.) Citation

Hersent, O., Petit, J., & Gurle, D. (2005). IP telephony: Deploying voice-over-IP protocols. Wiley.

Chicago Style (17th ed.) Citation

Hersent, Olivier, Jean-Pierre Petit, and David Gurle. IP Telephony: Deploying Voice-over-IP Protocols. Chichester, England: Wiley, 2005.

MLA (9th ed.) Citation

Hersent, Olivier, et al. IP Telephony: Deploying Voice-over-IP Protocols. Wiley, 2005.