(2006). Nortel guide to VPN routing for security and VoIP / James Edwards, Richard Bramante, Al Martin.
Čikaški stil citiranja (17. izdanje)Nortel Guide to VPN Routing for Security and VoIP / James Edwards, Richard Bramante, Al Martin. 2006.
MLA način citiranja (9. izdanje)Nortel Guide to VPN Routing for Security and VoIP / James Edwards, Richard Bramante, Al Martin. 2006.
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