Cita APA (7th ed.)

Johnston, A. B. (2004). SIP: Understanding the Session Initiation Protocol (2nd ed.). Artech House.

Cita Chicago (17th ed.)

Johnston, Alan B. SIP: Understanding the Session Initiation Protocol. 2nd ed. Boston: Artech House, 2004.

Cita MLA (9th ed.)

Johnston, Alan B. SIP: Understanding the Session Initiation Protocol. 2nd ed. Artech House, 2004.