Cita APA (7th ed.)

Darwin, C. The origin of species by means of natural selection ; or the preservation of favored races in the struggle for life. Hurst.

Cita Chicago (17th ed.)

Darwin, Charles. The Origin of Species by Means of Natural Selection ; or the Preservation of Favored Races in the Struggle for Life. New York: Hurst.

Cita MLA (9th ed.)

Darwin, Charles. The Origin of Species by Means of Natural Selection ; or the Preservation of Favored Races in the Struggle for Life. Hurst.