The origin of species by means of natural selection;
or, The preservation of favored races in the struggle for life /
by Charles Darwin. Reprinted from the 6th London ed., with all additions and corrections.

APA Citation

Darwin, C. (). The origin of species by means of natural selection: or, The preservation of favored races in the struggle for life. [New York]: A.L. Burt.

MLA Citation

Darwin, Charles, 1809-1882. The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races In the Struggle for Life. [New York]: A.L. Burt, .

Warning: These citations may not always be complete (especially for serials).