APA (7th ed.) Citation

Darwin, C., & Beer, G. (1996). The Origin of species. Oxford University Press.

Chicago Style (17th ed.) Citation

Darwin, Charles, and Gillian Beer. The Origin of Species. Oxford - New York New York: Oxford University Press, 1996.

MLA (8th ed.) Citation

Darwin, Charles, and Gillian Beer. The Origin of Species. Oxford University Press, 1996.