Roddy, D. (2004). Electronic communications (4.). Prentice Hall of India.
Dyfyniad Arddull ChicagoRoddy, Dennis. Electronic Communications. 4. New Delhi: Prentice Hall of India, 2004.
Dyfyniad MLARoddy, Dennis. Electronic Communications. 4. Prentice Hall of India, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.