Cita APA

Darwin, C. R. 1., & Ekman, P. (1998). The expression of the emotions in man and animals (3rd ed.). London: HarperCollins.

Citación estilo Chicago

Darwin, Charles Robert 1809-1882, and Paul Ekman. The Expression of the Emotions in Man and Animals. 3rd ed. London: HarperCollins, 1998.

Cita MLA

Darwin, Charles Robert 1809-1882, and Paul Ekman. The Expression of the Emotions in Man and Animals. 3rd ed. London: HarperCollins, 1998.