APA (7th ed.) Citation

Smith, J. M. (1958). The theory of evolution. Penguin books.

Chicago Style (17th ed.) Citation

Smith, J. Maynard. The Theory of Evolution. Maryland: Penguin books, 1958.

MLA (9th ed.) Citation

Smith, J. Maynard. The Theory of Evolution. Penguin books, 1958.

Warning: These citations may not always be 100% accurate.