APA (7 वां संस्करण) प्रशस्ति पत्र
Carpenter, C. (2009). Asterisk 1.4: The professional's guide : implementing, administering, and consulting on commercial IP telephony solutions. Packt Publishing Ltd..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Carpenter, Colman. Asterisk 1.4: The Professional's Guide : Implementing, Administering, and Consulting on Commercial IP Telephony Solutions. Birmingham, U.K.: Packt Publishing Ltd., 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Carpenter, Colman. Asterisk 1.4: The Professional's Guide : Implementing, Administering, and Consulting on Commercial IP Telephony Solutions. Packt Publishing Ltd., 2009.
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