On the origin of species by means of natural selection

MLA

Darwin, Charles Robert. On the Origin of Species by Means of Natural Selection. London, Glasgow: Collins' Clear-Type Press, 1910.

APA

Darwin, C. Robert. (1910). On the origin of species by means of natural selection. London, Glasgow: Collins' Clear-Type Press.

Chicago

Darwin, Charles Robert, On the Origin of Species by Means of Natural Selection. London, Glasgow: Collins' Clear-Type Press, 1910.