Darwin, C. (1958). The Origin of species: By means of natural selection or the preservation of favoured races in the struggle for life. New American Library.
Citazione stile Chigago Style (17a edizione)Darwin, Charles. The Origin of Species: By Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. New York: New American Library, 1958.
Citatione MLA (9a ed.)Darwin, Charles. The Origin of Species: By Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. New American Library, 1958.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.