APA (7th ed.) Citation

Empson, W. (1961). Seven types of ambiguity / by William Empson (3rd ed.). Penguin.

Chicago Style (17th ed.) Citation

Empson, William. Seven Types of Ambiguity / by William Empson. 3rd ed. Penguin, 1961.

MLA (9th ed.) Citation

Empson, William. Seven Types of Ambiguity / by William Empson. 3rd ed. Penguin, 1961.

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