APA (7th ed.) Citation

Darwin, C. (1909). The origin of species. P.F. Collier & Son.

Chicago Style (17th ed.) Citation

Darwin, Charles. The Origin of Species. New York: P.F. Collier & Son, 1909.

MLA (9th ed.) Citation

Darwin, Charles. The Origin of Species. P.F. Collier & Son, 1909.