APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Whitman, Michael E., et al. Guide to Firewalls and VPNs. 3η εκδ. Course Technology, Cengage Learning, 2012.