APA Citation
Darwin, Charles,. On the origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life. London: John Murray. Retrieved from https://library.si.edu/digital-library/book/onoriginofspec00darw
MLA Citation
Darwin, Charles,. On the origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life. London: John Murray, https://library.si.edu/digital-library/book/onoriginofspec00darw
Chicago
Darwin, Charles,. On the origin of species by means of natural selection, or, The preservation of favoured races in the struggle for life. London: John Murray, https://library.si.edu/digital-library/book/onoriginofspec00darw
Warning: These citations may not always be complete (especially for serials).