Cita APA (7a ed.)
Johnston, A. B. (2004). SIP: Understanding the Session Initiation Protocol (2nd ed.). Artech House.
Cita Chicago Style (17a ed.)
Johnston, Alan B. SIP: Understanding the Session Initiation Protocol. 2nd ed. Boston: Artech House, 2004.
Cita MLA (9a ed.)
Johnston, Alan B. SIP: Understanding the Session Initiation Protocol. 2nd ed. Artech House, 2004.
Precaución: Estas citas no son 100% exactas.