APA (7th ed.) Citation

Goncalves, F. E. (2010). Building telephony systems with OpenSIPS 1.6: Build scalable and robust telephony systems using SIP. Packt Pub.

Chicago Style (17th ed.) Citation

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 (9th ed.) Citation

Goncalves, Flavio E. Building Telephony Systems with OpenSIPS 1.6: Build Scalable and Robust Telephony Systems Using SIP. Packt Pub, 2010.

Warning: These citations may not always be 100% accurate.