Charles Darwin & Robert Maynard Hutchins. (1987). Great books of the western world, volume 49: The origin of the species by means of natural selection ; The descent of man and selection in relation to sex. Encyclopedia Britannica.
Chicago Style (17th ed.) CitationCharles Darwin and Robert Maynard Hutchins. Great Books of the Western World, Volume 49: The Origin of the Species by Means of Natural Selection ; The Descent of Man and Selection in Relation to Sex. Inc., Chicago: Encyclopedia Britannica, 1987.
MLA (9th ed.) CitationCharles Darwin and Robert Maynard Hutchins. Great Books of the Western World, Volume 49: The Origin of the Species by Means of Natural Selection ; The Descent of Man and Selection in Relation to Sex. Encyclopedia Britannica, 1987.
Warning: These citations may not always be 100% accurate.