Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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