APA (7th ed.) Citation

Darwin, C. (1964). On the origin of species. Atheneum.

Chicago Style (17th ed.) Citation

Darwin, Charles. On the Origin of Species. Atheneum, 1964.

MLA (9th ed.) Citation

Darwin, Charles. On the Origin of Species. Atheneum, 1964.

Warning: These citations may not always be 100% accurate.