APA (7th ed.) Citation

Ekman, P. (1972). Emotion in the human face (Primera edición.). Pergamon Press.

Chicago Style (17th ed.) Citation

Ekman, Paul. Emotion in the Human Face. Primera edición. New York: Pergamon Press, 1972.

MLA (8th ed.) Citation

Ekman, Paul. Emotion in the Human Face. Primera edición. Pergamon Press, 1972.

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