APA (7th ed.) Citation

Cooper, G. A. (1966). Charles Darwin, voyager-naturalist. Macmillan.

Chicago Style (17th ed.) Citation

Cooper, George Allen. Charles Darwin, Voyager-naturalist. New York: Macmillan, 1966.

MLA (9th ed.) Citation

Cooper, George Allen. Charles Darwin, Voyager-naturalist. Macmillan, 1966.

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