Held Gilbert & Hundley Kent. (1999). Cisco security architectures. McGraw-Hill.
Chicago Style (17th ed.) CitationHeld Gilbert and Hundley Kent. Cisco Security Architectures. McGraw-Hill, 1999.
MLA (8th ed.) CitationHeld Gilbert and Hundley Kent. Cisco Security Architectures. McGraw-Hill, 1999.
Warning: These citations may not always be 100% accurate.