Cita APA (7a ed.)

Darwin, C. (1937). The origin of species. P.F. Collier.

Cita Chicago Style (17a ed.)

Darwin, Charles. The Origin of Species. New York: P.F. Collier, 1937.

Cita MLA (8a ed.)

Darwin, Charles. The Origin of Species. P.F. Collier, 1937.