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Dyfyniad Arddull ChicagoAlberts, Jess K. Thinkwell's Public Speaking. Thinkwell Corporation, 2003.
Dyfyniad MLAAlberts, Jess K. Thinkwell's Public Speaking. Thinkwell Corporation, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.