Cita APA (7a ed.)

Smith, J. M. (1966). The Theory of evolution (2nd edition.). Penguin.

Cita Chicago Style (17a ed.)

Smith, John Maynard. The Theory of Evolution. 2nd edition. Middlesex: Penguin, 1966.

Cita MLA (8a ed.)

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