Picher, M. W. (2009). Building enterprise ready telephony systems with sipXecs 4.0: Leveraging open source VoIP for a rock-solid communications system. Packt Publishing.
Dyfyniad Arddull ChicagoPicher, Michael W. Building Enterprise Ready Telephony Systems with SipXecs 4.0: Leveraging Open Source VoIP for a Rock-solid Communications System. Birmingham, U.K.: Packt Publishing, 2009.
Dyfyniad MLAPicher, Michael W. Building Enterprise Ready Telephony Systems with SipXecs 4.0: Leveraging Open Source VoIP for a Rock-solid Communications System. Packt Publishing, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.