APA (7th ed.) Citation

Leonard, H. (1990). Out after dark. Penguin Books.

Chicago Style (17th ed.) Citation

Leonard, Hugh. Out After Dark. London u.a: Penguin Books, 1990.

MLA (9th ed.) Citation

Leonard, Hugh. Out After Dark. Penguin Books, 1990.

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