Gomillion, D., & Dempster, B. (2006). Building telephony systems whith Asterisk: An easy introduction to using and configuring Asterisk to build feature-rich telephony systems for small and medium businesses (1st ed., Repr.). Packt publishing.
Παραπομπή σε μορφή Chicago (17η εκδ.)Gomillion, David, και Barrie Dempster. Building Telephony Systems Whith Asterisk: An Easy Introduction to Using and Configuring Asterisk to Build Feature-rich Telephony Systems for Small and Medium Businesses. 1st ed., Repr. Birmihgham: Packt publishing, 2006.
Παραπομπή σε μορφή MLA (9th εκδ.)Gomillion, David, και Barrie Dempster. Building Telephony Systems Whith Asterisk: An Easy Introduction to Using and Configuring Asterisk to Build Feature-rich Telephony Systems for Small and Medium Businesses. 1st ed., Repr. Packt publishing, 2006.