APA (7th ed.) Citation

Sears, P. B. (1950). Charles Darwin: The naturalist as a cultural force. Scribner.

Chicago Style (17th ed.) Citation

Sears, Paul B. Charles Darwin: The Naturalist as a Cultural Force. New York: Scribner, 1950.

MLA (9th ed.) Citation

Sears, Paul B. Charles Darwin: The Naturalist as a Cultural Force. Scribner, 1950.