The origin of species by means of natural selection; or, The preservation of favored races in the struggle for lifeOn the origins of species

Chicago citation style
Darwin, Charles, 1809-1882. The origin of species by means of natural selection; or, The preservation of favored races in the struggle for life,On the origins of species. [1872?]. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011680351. (Accessed December 12, 2018.)
APA citation style
Darwin, Charles, 1809-1882, ([1872?]) The origin of species by means of natural selection; or, The preservation of favored races in the struggle for life,On the origins of species. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011680351
MLA citation style
Darwin, Charles, 1809-1882. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/011680351>.
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