392154 Walker, J. Q., & Hicks, J. T. (2004). Taking charge of your VoIP project. Indianapolis, IN : Cisco Press.
Lua i Stíl Chicago (17ú heag.)392154 Walker, John Q., agus Jeffrey T. Hicks. Taking Charge of Your VoIP Project. Indianapolis, IN : Cisco Press, 2004.
Lua MLA (9ú heag.)392154 Walker, John Q., agus Jeffrey T. Hicks. Taking Charge of Your VoIP Project. Indianapolis, IN : Cisco Press, 2004.
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