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Dyfyniad Arddull ChicagoMarius, Richard. The McGraw-Hill College Handbook. New York: McGraw-Hill, 1994.
Dyfyniad MLAMarius, Richard. The McGraw-Hill College Handbook. New York: McGraw-Hill, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.