APA Edition Citation

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

Chicago Edition Citation

Darwin, Charls. The Origin of Species by Means of Natural Selection or: The Preservation of Favoured Races in the Struggle for Life. London, Penguin Books.

MLA Edition Citation

Darwin, Charls. The Origin of Species by Means of Natural Selection or: The Preservation of Favoured Races in the Struggle for Life.