Παραπομπή σε μορφή APA (7η εκδ.)

Holden, G. (2003). Guide to firewalls and network security: With intrusion detection and VPNs. Thomson Learning.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Holden, Greg. Guide to Firewalls and Network Security: With Intrusion Detection and VPNs. Thomson Learning, 2003.

Παραπομπή σε μορφή MLA (8th εκδ.)

Holden, Greg. Guide to Firewalls and Network Security: With Intrusion Detection and VPNs. Thomson Learning, 2003.