APA (7th ed.) Citation

Clark, A. N. (1990). The Penguin dictionary of geography. Penguin Books.

Chicago Style (17th ed.) Citation

Clark, Audrey N. The Penguin Dictionary of Geography. London: Penguin Books, 1990.

MLA (8th ed.) Citation

Clark, Audrey N. The Penguin Dictionary of Geography. Penguin Books, 1990.

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