APA (7th ed.) Citation

Darwin, C., & Stauffer, R. C. (1975). Charles Darwin's natural selection: Being the second part of his big species book written from 1856 to 1858. Cambridge University Press.

Chicago Style (17th ed.) Citation

Darwin, Charles, and R. C. Stauffer. Charles Darwin's Natural Selection: Being the Second Part of His Big Species Book Written from 1856 to 1858. London ; New York: Cambridge University Press, 1975.

MLA (9th ed.) Citation

Darwin, Charles, and R. C. Stauffer. Charles Darwin's Natural Selection: Being the Second Part of His Big Species Book Written from 1856 to 1858. Cambridge University Press, 1975.