Cita APA (7th ed.)

Flanagan, W. A. (2012). VoIP and unified communications: Internet telephony and the future voice network. John Wiley and Sons, Inc.

Cita Chicago (17th ed.)

Flanagan, William A. VoIP and Unified Communications: Internet Telephony and the Future Voice Network. Hoboken: John Wiley and Sons, Inc, 2012.

Cita MLA (9th ed.)

Flanagan, William A. VoIP and Unified Communications: Internet Telephony and the Future Voice Network. John Wiley and Sons, Inc, 2012.