Darwin, C., & Burrow, J. W. (1868). The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life. Penguin Books.
Chicago Style (17th ed.) CitationDarwin, Charles, and J. W. Burrow. The Origin of Species by Means of Natural Selection, or, The Preservation of Favored Races in the Struggle for Life. Penguin Books, 1868.
MLA (9th ed.) CitationDarwin, Charles, and J. W. Burrow. The Origin of Species by Means of Natural Selection, or, The Preservation of Favored Races in the Struggle for Life. Penguin Books, 1868.
Warning: These citations may not always be 100% accurate.