Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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