APA (7th ed.) Citation

Whitman, M. E., Mattord, H. J., & Green, A. (2012). Guide to firewalls and VPNs (3rd ed.). Course Technology / Cengage Learning.

Chicago Style (17th ed.) Citation

Whitman, Michael E., Herbert J. Mattord, and Andrew Green. Guide to Firewalls and VPNs. 3rd ed. Boston, MA: Course Technology / Cengage Learning, 2012.

MLA (9th ed.) Citation

Whitman, Michael E., et al. Guide to Firewalls and VPNs. 3rd ed. Course Technology / Cengage Learning, 2012.

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