APA (7th ed.) Citation

Gielgud, J., Miller, J., & Powell, J. (1981). An actor and his time. Penguin Books.

Chicago Style (17th ed.) Citation

Gielgud, John, John Miller, and John Powell. An Actor and His Time. Harmondsworth: Penguin Books, 1981.

MLA (9th ed.) Citation

Gielgud, John, et al. An Actor and His Time. Penguin Books, 1981.