APA (7th ed.) Citation

Perrier, E., Radin, P., & Collum, V. C. C. (1925). The earth before history: Man's origin and the origin of life. A.A. Knopf.

Chicago Style (17th ed.) Citation

Perrier, Edmond, Paul Radin, and Vera Christina Chute Collum. The Earth Before History: Man's Origin and the Origin of Life. New York: A.A. Knopf, 1925.

MLA (9th ed.) Citation

Perrier, Edmond, et al. The Earth Before History: Man's Origin and the Origin of Life. A.A. Knopf, 1925.