Bellamy, J. C. (2000). Digital telephony (3rd ed.). Wiley.
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Dyfyniad Arddull Chicago
Bellamy, John C. Digital Telephony. 3rd ed. New Delhi: Wiley, 2000.
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Dyfyniad MLA
Bellamy, John C. Digital Telephony. 3rd ed. Wiley, 2000.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.