Dyfyniad APA

Harmer, J. (1992). The Practice of English Language Teaching. London: Longman.

Dyfyniad Arddull Chicago

Harmer, Jeremy. The Practice of English Language Teaching. London: Longman, 1992.

Dyfyniad MLA

Harmer, Jeremy. The Practice of English Language Teaching. London: Longman, 1992.

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