Citação norma APA

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

Citação norma Chicago

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

Citação norma MLA

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

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.