Holden, G. (2003). Guide to network defense and countermeasures. Thomson Learning.
Lua i Stíl Chicago (17ú heag.)Holden, Greg. Guide to Network Defense and Countermeasures. Thomson Learning, 2003.
Lua MLA (8ú heag.)Holden, Greg. Guide to Network Defense and Countermeasures. Thomson Learning, 2003.
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