APA (7th ed.) Citation

Gardner, H. (1983). A thousand clowns. Penguin Books.

Chicago Style (17th ed.) Citation

Gardner, Herb. A Thousand Clowns. Harmondsworth, Middlesex ; New York: Penguin Books, 1983.

MLA (9th ed.) Citation

Gardner, Herb. A Thousand Clowns. Penguin Books, 1983.