Cita APA (7th ed.)
Sinnreich, H., & Johnston, A. B. Internet Communications Using SIP: Delivering VoIP and Multimedia Services with Session Initiation Protocol (2a edición.). Wiley.
Cita Chicago (17th ed.)
Sinnreich, Henry, i Alan B. Johnston. Internet Communications Using SIP: Delivering VoIP and Multimedia Services with Session Initiation Protocol. 2a edición. Indianápolis, EUA: Wiley.
Cita MLA (9th ed.)
Sinnreich, Henry, i Alan B. Johnston. Internet Communications Using SIP: Delivering VoIP and Multimedia Services with Session Initiation Protocol. 2a edición. Wiley.
Atenció: Aquestes cites poden no estar 100% correctes.