APA Style

Durkin., J, F. (2003). Voice enabling the data network : H.323, MGCP, SIP, QoS, SLAs, and security . Indianapolis,USA: Cisco Press.

MLA Style

Durkin., James, F.. "Voice enabling the data network : H.323, MGCP, SIP, QoS, SLAs, and security". Indianapolis,USA: Cisco Press, 2003. Text.