Cita APA (7a ed.)

Darwin, C., Barrett, P. H., & Freeman, R. B. (1988). On the origin of species: 1859. Pickering.

Cita Chicago Style (17a ed.)

Darwin, Charles, Paul H. Barrett, y R. B. Freeman. On the Origin of Species: 1859. London: Pickering, 1988.

Cita MLA (8a ed.)

Darwin, Charles, et al. On the Origin of Species: 1859. Pickering, 1988.