APA (7th ed.) Citation

Payton, G., Paxton, J., & Warner, F. (1991). The penguin dictionary of proper names. Penguin Books.

Chicago Style (17th ed.) Citation

Payton, Geoffrey, John Paxton, and Frederick Warner. The Penguin Dictionary of Proper Names. London: Penguin Books, 1991.

MLA (9th ed.) Citation

Payton, Geoffrey, et al. The Penguin Dictionary of Proper Names. Penguin Books, 1991.