Darwin, C., & Burrow, J. W. (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, y J. W. Burrow. The Origin of Species: By Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. Middlesex, England: Penguin Books, 1968.
Cita MLA (8a ed.)Darwin, Charles, y J. W. Burrow. 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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