APA (7th ed.) Citation

Darwin, C., & Ekman, P. (1998). The expression of the emotions in man and animals / Charles Darwin (3rd ed.). HarperCollins.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Darwin, Charles, and Paul Ekman. The Expression of the Emotions in Man and Animals / Charles Darwin. 3rd ed. HarperCollins, 1998.

Warning: These citations may not always be 100% accurate.