Cita APA (7th ed.)

Empson, W. (1973). Seven types of ambiguity. Penguin Books.

Cita Chicago (17th ed.)

Empson, William. Seven Types of Ambiguity. Harmondsworth: Penguin Books, 1973.

Cita MLA (9th ed.)

Empson, William. Seven Types of Ambiguity. Penguin Books, 1973.