APA (7th ed.) Citation

Darwin, C. (1969). The expression of the emotions in man and animals. Greenwood Press.

Chicago Style (17th ed.) Citation

Darwin, Charles. The Expression of the Emotions in Man and Animals. New York: Greenwood Press, 1969.

MLA (9th ed.) Citation

Darwin, Charles. The Expression of the Emotions in Man and Animals. Greenwood Press, 1969.