Cita APA (7th ed.)

Hersent, O., Gurle, D., & Petit, J. (2000). IP telephony: Packet-based multimedia communications systems. Pearson Education.

Cita Chicago (17th ed.)

Hersent, Olivier, David Gurle, i Jean-Pierre Petit. IP Telephony: Packet-based Multimedia Communications Systems. Essex: Pearson Education, 2000.

Cita MLA (9th ed.)

Hersent, Olivier, et al. IP Telephony: Packet-based Multimedia Communications Systems. Pearson Education, 2000.