APA (7th ed.) Citation

Johnston, A. B. (2016). SIP Understanding the session initiation protocol (Fourth Edition.). Artech House.

Chicago Style (17th ed.) Citation

Johnston, Alan B. SIP Understanding the Session Initiation Protocol. Fourth Edition. [Massachusetts, United States]: Artech House, 2016.

MLA (9th ed.) Citation

Johnston, Alan B. SIP Understanding the Session Initiation Protocol. Fourth Edition. Artech House, 2016.

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