Dyfyniad APA

Harmer, J. (1987). Teaching and learning grammar. Longman.

Dyfyniad Arddull Chicago

Harmer, Jeremy. Teaching and Learning Grammar. Londres: Longman, 1987.

Dyfyniad MLA

Harmer, Jeremy. Teaching and Learning Grammar. Longman, 1987.

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