edited by Patricia Byrd. Meterial writer's guide. New York: Heinle & Heinle.
Dyfyniad Arddull Chicagoedited by Patricia Byrd. Meterial Writer's Guide. New York: Heinle & Heinle.
Dyfyniad MLAedited by Patricia Byrd. Meterial Writer's Guide. New York: Heinle & Heinle.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.