Cisco Networking Academy Program. (2003). Cisco Networking Academy Program: It essentials I, PC hardware and sftware companion guide (First edition.). Editorial Cisco Press.
Lua i Stíl Chicago (17ú heag.)Cisco Networking Academy Program. Cisco Networking Academy Program: It Essentials I, PC Hardware and Sftware Companion Guide. First edition. Indianápolis: Editorial Cisco Press, 2003.
Lua MLA (8ú heag.)Cisco Networking Academy Program. Cisco Networking Academy Program: It Essentials I, PC Hardware and Sftware Companion Guide. First edition. Editorial Cisco Press, 2003.
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