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Dyfyniad Arddull ChicagoTeach Yourself the Internet in a Week. 2nd Ed. 2nd. New Delhi: PHI, 1995.
Dyfyniad MLATeach Yourself the Internet in a Week. 2nd Ed. 2nd. PHI, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.