Cita APA (7th ed.)

Darwin, C. (2013). The expression of the emotions in man and animals. Cambridge University.

Cita Chicago (17th ed.)

Darwin, Charles. The Expression of the Emotions in Man and Animals. London: Cambridge University, 2013.

Cita MLA (9th ed.)

Darwin, Charles. The Expression of the Emotions in Man and Animals. Cambridge University, 2013.