APA-referens (7:e uppl.)
Goncalves, F. E. (2010). Building telephony systems with OpenSIPS 1.6: Build scalable and robust telephony systems using SIP. Packt Pub..
Chicago-referens (17:e uppl.)
Goncalves, Flavio E. Building Telephony Systems with OpenSIPS 1.6: Build Scalable and Robust Telephony Systems Using SIP. Birmingham, U.K.: Packt Pub., 2010.
MLA-referens (9:e uppl.)
Goncalves, Flavio E. Building Telephony Systems with OpenSIPS 1.6: Build Scalable and Robust Telephony Systems Using SIP. Packt Pub., 2010.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.