APA (7th ed.) Citation

Hartpence, B., Oram, A., Gulick, M., & Demarest, R. (2013). Packet guide to Voice over IP (First edition.). O'Reilly Media, Inc.

Chicago Style (17th ed.) Citation

Hartpence, Bruce, Andrew Oram, Maria Gulick, and Rebecca Demarest. Packet Guide to Voice over IP. First edition. Sebastopol, CA: O'Reilly Media, Inc, 2013.

MLA (9th ed.) Citation

Hartpence, Bruce, et al. Packet Guide to Voice over IP. First edition. O'Reilly Media, Inc, 2013.