APA (7th ed.) Citation

Shaffer, P. (1981). Four plays. Penguin Books.

Chicago Style (17th ed.) Citation

Shaffer, Peter. Four Plays. Harmondsworth, Middlesex ; New York, N.Y.: Penguin Books, 1981.

MLA (9th ed.) Citation

Shaffer, Peter. Four Plays. Penguin Books, 1981.

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