APA (7th ed.) Citation

Whitten, D. G. A., & Brooks, J. R. V. (1972). The penguin dictionary of geology. Penguin Books.

Chicago Style (17th ed.) Citation

Whitten, D. G. A., and J. R. V. Brooks. The Penguin Dictionary of Geology. London: Penguin Books, 1972.

MLA (9th ed.) Citation

Whitten, D. G. A., and J. R. V. Brooks. The Penguin Dictionary of Geology. Penguin Books, 1972.