APA (7th ed.) Citation

Maynard Smith, J. (1966). The theory of evolution (2nd ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Maynard Smith, John. The Theory of Evolution. 2nd ed. [Harmondsworth, Middlesex]: Penguin Books, 1966.

MLA (9th ed.) Citation

Maynard Smith, John. The Theory of Evolution. 2nd ed. Penguin Books, 1966.

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