Dyfyniad APA

May, P. (2002). Towards proficiency: Students book. New York: Oxford University Press.

Dyfyniad Arddull Chicago

May, Peter. Towards Proficiency: Students Book. New York: Oxford University Press, 2002.

Dyfyniad MLA

May, Peter. Towards Proficiency: Students Book. New York: Oxford University Press, 2002.

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