APA-referens (7:e uppl.)
Darwin, C. (1872). On the origin of species: By means of natural selection (Sixth edition.). The Floating Press.
Chicago-referens (17:e uppl.)
Darwin, Charles. On the Origin of Species: By Means of Natural Selection. Sixth edition. [Auckland, New Zealand]: The Floating Press, 1872.
MLA-referens (9:e uppl.)
Darwin, Charles. On the Origin of Species: By Means of Natural Selection. Sixth edition. The Floating Press, 1872.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.