APA (7th ed.) Citation

Clark, R. E. D. (1976). Darwin, before and after: The story of evolution. Folcroft Library Editions.

Chicago Style (17th ed.) Citation

Clark, Robert E. D. Darwin, Before and After: The Story of Evolution. Folcroft, Pa.: Folcroft Library Editions, 1976.

MLA (9th ed.) Citation

Clark, Robert E. D. Darwin, Before and After: The Story of Evolution. Folcroft Library Editions, 1976.