APA (7th ed.) Zitazioa
Ekman, P., & Friesen, W. V. (1975). Unmasking the Face: A Guide to Recognizing Emotions from Facial Clues. Prentice-Hall.
Chicago Style (17th ed.) Zitazioa
Ekman, Paul, eta Wallace V. Friesen. Unmasking the Face: A Guide to Recognizing Emotions from Facial Clues. Englewood Cliffs, EUA: Prentice-Hall, 1975.
MLA (9th ed.) Zitazioa
Ekman, Paul, eta Wallace V. Friesen. Unmasking the Face: A Guide to Recognizing Emotions from Facial Clues. Prentice-Hall, 1975.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.