APA (7th ed.) Citation

Wells, D. (1991). The Penguin dictionary of curious and interesting geometry. Penguin.

Chicago Style (17th ed.) Citation

Wells, David. The Penguin Dictionary of Curious and Interesting Geometry. London: Penguin, 1991.

MLA (8th ed.) Citation

Wells, David. The Penguin Dictionary of Curious and Interesting Geometry. Penguin, 1991.

Warning: These citations may not always be 100% accurate.