APA (7th ed.) Citation

Whitten, D. (1977). The Penguin dictionary of geology. Penguin.

Chicago Style (17th ed.) Citation

Whitten, D.G.A. The Penguin Dictionary of Geology. Harmondsworth: Penguin, 1977.

MLA (9th ed.) Citation

Whitten, D.G.A. The Penguin Dictionary of Geology. Penguin, 1977.