Cita APA (7th ed.)

Ekman, P., & Friesen, W. V. (2003). Unmasking the face: A guide to recognizing emotions from facial clues. Malor Books.

Cita Chicago (17th ed.)

Ekman, Paul, i Wallace V. Friesen. Unmasking the Face: A Guide to Recognizing Emotions from Facial Clues. Cambridge, Massachusetts: Malor Books, 2003.

Cita MLA (9th ed.)

Ekman, Paul, i Wallace V. Friesen. Unmasking the Face: A Guide to Recognizing Emotions from Facial Clues. Malor Books, 2003.