APA استشهاد

NIIT. (2005). Basics of network security, firewalls and VPNs. Prentice Hall.

استشهاد بنمط شيكاغو

NIIT. Basics of Network Security, Firewalls and VPNs. New Delhi: Prentice Hall, 2005.

MLA استشهاد

NIIT. Basics of Network Security, Firewalls and VPNs. Prentice Hall, 2005.