Darwin, C. (1962). The origin of species: By means of natural selection or the preservation of favored races in the struggle for life. The Nodern Library.
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: The Nodern Library, 1962.
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. The Nodern Library, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.