Dyfyniad APA

(2001). Writer's choice: Grammar and composition. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Writer's Choice: Grammar and Composition. New York: McGraw-Hill, 2001.

Dyfyniad MLA

Writer's Choice: Grammar and Composition. New York: McGraw-Hill, 2001.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.