APA (7th ed.) Citation

Davidson, J. A., & Davidson, J. (2007). Voice over IP fundamentals (2nd ed.). Cisco Press.

Chicago Style (17th ed.) Citation

Davidson, Jonathan Author, and Johnathan Davidson. Voice over IP Fundamentals. 2nd ed. [Place of publication not identified]: Cisco Press, 2007.

MLA (9th ed.) Citation

Davidson, Jonathan Author, and Johnathan Davidson. Voice over IP Fundamentals. 2nd ed. Cisco Press, 2007.