APA (7th ed.) Citation

Darwin, C. (1872). The Expression of the Emotions in Man and Animals. Cambridge University Press.

Chicago Style (17th ed.) Citation

Darwin, Charles. The Expression of the Emotions in Man and Animals. Cambridge: Cambridge University Press, 1872.

MLA (9th ed.) Citation

Darwin, Charles. The Expression of the Emotions in Man and Animals. Cambridge University Press, 1872.