Παραπομπή APA

Empson, W. (1961). Seven types of ambiguity ([3rd ed.].). Penguin Books in association with Chatto and Windus.

Παραπομπή Chicago Style

Empson, William. Seven Types of Ambiguity. [3rd ed.]. Harmondsworth, Middlesex: Penguin Books in association with Chatto and Windus, 1961.

Παραπομπή MLA

Empson, William. Seven Types of Ambiguity. [3rd ed.]. Penguin Books in association with Chatto and Windus, 1961.