APA (7th ed.) Citation

Smith, J. M. (1958). The theory of evolution: John Maynard Smith. Penguin Books.

Chicago Style (17th ed.) Citation

Smith, John Maynard. The Theory of Evolution: John Maynard Smith. Baltimore: Penguin Books, 1958.

MLA (9th ed.) Citation

Smith, John Maynard. The Theory of Evolution: John Maynard Smith. Penguin Books, 1958.