APA (7th ed.) Citation

Huxley, T. H. (1863). On the origin of species: Or, the causes of the phenomena of organic nature. D. Appleton.

Chicago Style (17th ed.) Citation

Huxley, Thomas H. On the Origin of Species: Or, the Causes of the Phenomena of Organic Nature. New York: D. Appleton, 1863.

MLA (9th ed.) Citation

Huxley, Thomas H. On the Origin of Species: Or, the Causes of the Phenomena of Organic Nature. D. Appleton, 1863.