Cisco Networking Academy Program., & Cisco Systems, I. (2005). Cisco Networking Academy Program: CCNA 1 and 2 companion guide (Rev. 3rd ed.). Indianapolis, Ind.: Cisco Press.
Παραπομπή Chicago StyleCisco Networking Academy Program., και Inc Cisco Systems. Cisco Networking Academy Program: CCNA 1 and 2 Companion Guide. Rev. 3rd ed. Indianapolis, Ind.: Cisco Press, 2005.
Παραπομπή MLACisco Networking Academy Program., και Inc Cisco Systems. Cisco Networking Academy Program: CCNA 1 and 2 Companion Guide. Rev. 3rd ed. Indianapolis, Ind.: Cisco Press, 2005.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.