APA-referens (7:e uppl.)
Goncalves, F. E. (2008). Building telephony systems with OpenSER: A step-by-step guide to building a high-performance telephony system. Packt.
Chicago-referens (17:e uppl.)
Goncalves, Flavio E. Building Telephony Systems with OpenSER: A Step-by-step Guide to Building a High-performance Telephony System. Birmingham: Packt, 2008.
MLA-referens (9:e uppl.)
Goncalves, Flavio E. Building Telephony Systems with OpenSER: A Step-by-step Guide to Building a High-performance Telephony System. Packt, 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.