APA (7th ed.) Citation

Williams, W. E. (1956). The Penguin story, MCMXXXV-MCMLVI. Penguin Books.

Chicago Style (17th ed.) Citation

Williams, W. E. The Penguin Story, MCMXXXV-MCMLVI. Harmondsworth, Middlesex: Penguin Books, 1956.

MLA (9th ed.) Citation

Williams, W. E. The Penguin Story, MCMXXXV-MCMLVI. Penguin Books, 1956.