1.
, . The origin of species by means of natural selection or the preservation of favoured races in the struggle for life. Harmondsworth: Penguin Books; 1984.
et . The origin of species by means of natural selection or the preservation of favoured races in the struggle for life. Harmondsworth : Penguin Books, 4 mai 1984. ISBN 0-14-043205-1
Darwin Charles & Burrow John Wyon. (1984). The origin of species by means of natural selection or the preservation of favoured races in the struggle for life. Penguin Books.
MLA (8th ed.) CitationDarwin Charles and Burrow John Wyon. The Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. Penguin Books, 1984.
Warning: These citations may not always be 100% accurate.