Holden, G. (2003). Guide to firewalls and network security: With intrusion detection and VPNs. Thomson Learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHolden, Greg. Guide to Firewalls and Network Security: With Intrusion Detection and VPNs. Thomson Learning, 2003.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHolden, Greg. Guide to Firewalls and Network Security: With Intrusion Detection and VPNs. Thomson Learning, 2003.
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