Cisco Networking Academy Program. (2003). Cisco Networking Academy Program: It essentials II, Network operating companion guide (First edition.). Editorial Cisco Press.
Chicago-referens (17:e uppl.)Cisco Networking Academy Program. Cisco Networking Academy Program: It Essentials II, Network Operating Companion Guide. First edition. Indianápolis: Editorial Cisco Press, 2003.
MLA-referens (8:e uppl.)Cisco Networking Academy Program. Cisco Networking Academy Program: It Essentials II, Network Operating Companion Guide. First edition. Editorial Cisco Press, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.