Cita APA (7th ed.)
Merel, D., Dempster, B., & Gomillion, D. (2009). Asterisk 1.6: Build feature-rich telephony systems with Asterisk. Packt Pub..
Cita Chicago (17th ed.)
Merel, David, Barrie Dempster, i David Gomillion. Asterisk 1.6: Build Feature-rich Telephony Systems with Asterisk. Birmingham, U.K.: Packt Pub., 2009.
Cita MLA (9th ed.)
Merel, David, et al. Asterisk 1.6: Build Feature-rich Telephony Systems with Asterisk. Packt Pub., 2009.
Atenció: Aquestes cites poden no estar 100% correctes.