APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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