APA (7th ed.) Citation

Darwin, C., & Darwin, F. (2010). The expression of the emotions in man and animals (Second edition.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Darwin, Charles, and Francis Darwin. The Expression of the Emotions in Man and Animals. Second edition. Cambridge: Cambridge University Press, 2010.

MLA (9th ed.) Citation

Darwin, Charles, and Francis Darwin. The Expression of the Emotions in Man and Animals. Second edition. Cambridge University Press, 2010.