Dyfyniad APA

McGowen, B., & Richardson, V. (2000). Clockwise: Pre - intermediate : Classbook. New York: Oxford University Press.

Dyfyniad Arddull Chicago

McGowen, Bruce., và Vic Richardson. Clockwise: Pre - Intermediate : Classbook. New York: Oxford University Press, 2000.

Dyfyniad MLA

McGowen, Bruce., và Vic Richardson. Clockwise: Pre - Intermediate : Classbook. New York: Oxford University Press, 2000.

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