Simionovich, N. (2009). Asterisk Gateway Interface 1.4 and 1.6 programming: Design and develop Asterisk-based VoIP telephony platforms and services using PHP and PHPAG. Packt Pub..
Lua i Stíl Chicago (17ú heag.)Simionovich, Nir. Asterisk Gateway Interface 1.4 and 1.6 Programming: Design and Develop Asterisk-based VoIP Telephony Platforms and Services Using PHP and PHPAG. Birmingham, U.K.: Packt Pub., 2009.
Lua MLA (9ú heag.)Simionovich, Nir. Asterisk Gateway Interface 1.4 and 1.6 Programming: Design and Develop Asterisk-based VoIP Telephony Platforms and Services Using PHP and PHPAG. Packt Pub., 2009.
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