Dyfyniad APA

Crystal, D. (1984). Who cares about English usage? Penguin.

Dyfyniad Arddull Chicago

Crystal, David. Who Cares About English Usage? Harmondsworth, Middlesex: Penguin, 1984.

Dyfyniad MLA

Crystal, David. Who Cares About English Usage? Penguin, 1984.

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