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Dyfyniad Arddull ChicagoHerren, Ray V. Exploring Agriscience. Australia: Delmar Learning, 2004.
Dyfyniad MLAHerren, Ray V. Exploring Agriscience. Australia: Delmar Learning, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.