APA (7th ed.) Citation

Smart, W. M. (1959). The origin of the earth QB981 .S. Penguin.

Chicago Style (17th ed.) Citation

Smart, William M. The Origin of the Earth QB981 .S. Harmondsworth, Middlesex: Penguin, 1959.

MLA (9th ed.) Citation

Smart, William M. The Origin of the Earth QB981 .S. Penguin, 1959.