Cita APA (7th ed.)

Whitten, D. G. A. (1972). The Penguin dictionary of geology. Penguin Books.

Cita Chicago (17th ed.)

Whitten, D. G. A. The Penguin Dictionary of Geology. [Harmondsworth, Eng.]: Penguin Books, 1972.

Cita MLA (9th ed.)

Whitten, D. G. A. The Penguin Dictionary of Geology. Penguin Books, 1972.