Ledford, J. L. (2006). Cut the cord!: The consumer's guide to VoIP. Thomson Course Technology PTR.
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Citação norma Chicago
Ledford, Jerry L. Cut the Cord!: The Consumer's Guide to VoIP. Boston, MA: Thomson Course Technology PTR, 2006.
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Citação norma MLA
Ledford, Jerry L. Cut the Cord!: The Consumer's Guide to VoIP. Thomson Course Technology PTR, 2006.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.