Gomillon, D., & Dempster, B. (2005). Building Telephony System with Asterisk: An easy introduction to using and configuring Asterisk to build feature-rich telephony systems for small and medium businesses (First edition.). Packt Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGomillon, David, और Barrie Dempster. Building Telephony System with Asterisk: An Easy Introduction to Using and Configuring Asterisk to Build Feature-rich Telephony Systems for Small and Medium Businesses. First edition. Birmingham: Packt Publishing, 2005.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGomillon, David, और Barrie Dempster. Building Telephony System with Asterisk: An Easy Introduction to Using and Configuring Asterisk to Build Feature-rich Telephony Systems for Small and Medium Businesses. First edition. Packt Publishing, 2005.