APA (7th ed.) Citation

O'Connor, D. J., & Locke, J. (1952). John Locke. Penguin Books.

Chicago Style (17th ed.) Citation

O'Connor, D. J., and John Locke. John Locke. London ; Baltimore: Penguin Books, 1952.

MLA (9th ed.) Citation

O'Connor, D. J., and John Locke. John Locke. Penguin Books, 1952.