Cita APA (7a ed.)

Empson, W. (1965). Seven types of ambiguity. Penguin.

Cita Chicago Style (17a ed.)

Empson, William. Seven Types of Ambiguity. Harmondsworth: Penguin, 1965.

Cita MLA (9a ed.)

Empson, William. Seven Types of Ambiguity. Penguin, 1965.