Cita APA (7a ed.)
Darwin, C. R. (1968). The origin of species by means of natural selection: Or, the preservation of favoured races in the struggle for life. Penguin Books.
Cita Chicago Style (17a ed.)
Darwin, Charles Robert. The Origin of Species by Means of Natural Selection: Or, the Preservation of Favoured Races in the Struggle for Life. Baltimore: Penguin Books, 1968.
Cita MLA (9a ed.)
Darwin, Charles Robert. The Origin of Species by Means of Natural Selection: Or, the Preservation of Favoured Races in the Struggle for Life. Penguin Books, 1968.
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