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Dyfyniad Arddull ChicagoOber, Scot. Contemporary Business Communication. 3rd ed., Instructor's annotated ed. Boston: Houghton Mifflin Co. ;Chennai :AIPD, 2000.
Dyfyniad MLAOber, Scot. Contemporary Business Communication. 3rd ed., Instructor's annotated ed. Houghton Mifflin Co. ;Chennai :AIPD, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.