Dyfyniad APA

O"connor, J., & Fletcher, C. (1989). Sounds English: A Pronunciation Practice Book. London: Longman.

Dyfyniad Arddull Chicago

O"connor, J.d., và Clare Fletcher. Sounds English: A Pronunciation Practice Book. London: Longman, 1989.

Dyfyniad MLA

O"connor, J.d., và Clare Fletcher. Sounds English: A Pronunciation Practice Book. London: Longman, 1989.

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