APA (7th ed.) Citation

Hersent, O., Gurle, D., & Petit, J. (2005). IP telephony: Deploying voice-over IP protocols. John Wiley. https://doi.org/10.1002/0470023619

Chicago Style (17th ed.) Citation

Hersent, Olivier, David Gurle, and Jean-Pierre Petit. IP Telephony: Deploying Voice-over IP Protocols. Chichester, England ; Hoboken, NJ: John Wiley, 2005. https://doi.org/10.1002/0470023619.

MLA (9th ed.) Citation

Hersent, Olivier, et al. IP Telephony: Deploying Voice-over IP Protocols. John Wiley, 2005. https://doi.org/10.1002/0470023619.