APA (7th ed.) Citation

Darwin, C. (1993). The Harvard classics: V.19.: The Origin of species. The Easton Press.

Chicago Style (17th ed.) Citation

Darwin, Charles. The Harvard Classics: V.19.: The Origin of Species. The Easton Press, 1993.

MLA (8th ed.) Citation

Darwin, Charles. The Harvard Classics: V.19.: The Origin of Species. The Easton Press, 1993.

Warning: These citations may not always be 100% accurate.