APA (7th ed.) Citation

Willey, B. (1960). Darwin and Butler: Two versions of evolution ([1st American ed.].). Harcourt, Brace.

Chicago Style (17th ed.) Citation

Willey, Basil. Darwin and Butler: Two Versions of Evolution. [1st American ed.]. New York: Harcourt, Brace, 1960.

MLA (9th ed.) Citation

Willey, Basil. Darwin and Butler: Two Versions of Evolution. [1st American ed.]. Harcourt, Brace, 1960.