Lua APA (7ú heag.)

Hardy, W. C. (2003). VoIP Service qualityMeasuring and evaluating packet-switched voiceWilliam C. Hardy. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Hardy, William C. VoIP Service QualityMeasuring and Evaluating Packet-switched VoiceWilliam C. Hardy. McGraw-Hill, 2003.

Lua MLA (8ú heag.)

Hardy, William C. VoIP Service QualityMeasuring and Evaluating Packet-switched VoiceWilliam C. Hardy. McGraw-Hill, 2003.

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