APA (7th ed.) Citation

Camus, A., Gilbert, S., & Connolly, C. (1962). The Outsider. Penguin Books.

Chicago Style (17th ed.) Citation

Camus, Albert, Stuart Gilbert, and Cyril Connolly. The Outsider. Harmondsworth [u.a.]: Penguin Books, 1962.

MLA (8th ed.) Citation

Camus, Albert, et al. The Outsider. Penguin Books, 1962.