APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.