APA (7th ed.) Citation

Park, P. A. (2009). Voice over IP security (1st edition.). Cisco Press.

Chicago Style (17th ed.) Citation

Park, Patrick Author. Voice over IP Security. 1st edition. [Place of publication not identified]: Cisco Press, 2009.

MLA (9th ed.) Citation

Park, Patrick Author. Voice over IP Security. 1st edition. Cisco Press, 2009.