Cita APA (7a ed.)

Ekman, P., & Friesen, W. V. (1984). Unmasking the face: A guide to recognizing emotions from facial clues. Consulting Psychologists Press.

Cita Chicago Style (17a ed.)

Ekman, Paul, y Wallace V. Friesen. Unmasking the Face: A Guide to Recognizing Emotions from Facial Clues. Palo Alto, California: Consulting Psychologists Press, 1984.

Cita MLA (9a ed.)

Ekman, Paul, y Wallace V. Friesen. Unmasking the Face: A Guide to Recognizing Emotions from Facial Clues. Consulting Psychologists Press, 1984.