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Dyfyniad Arddull ChicagoHartmann, Pamela. Interactions Access: Reading. New York: McGraw-Hill, 2007.
Dyfyniad MLAHartmann, Pamela. Interactions Access: Reading. New York: McGraw-Hill, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.