Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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