Dyfyniad APA

Harmer, J. (2004). How to teach writing. Longman.

Dyfyniad Arddull Chicago

Harmer, Jeremy. How to Teach Writing. Harlow, England: Longman, 2004.

Dyfyniad MLA

Harmer, Jeremy. How to Teach Writing. Longman, 2004.

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