Cita APA (7a ed.)
Darwin, C. (2001). On the origin of species by means of natural selection: Or, The Preservation of favoured races in the struggle for life. Electric Book Co..
Cita Chicago Style (17a ed.)
Darwin, Charles. On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life. London: Electric Book Co., 2001.
Cita MLA (9a ed.)
Darwin, Charles. On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life. Electric Book Co., 2001.
Precaución: Estas citas no son 100% exactas.