Ekman, P. Duchenne and facial expression of emotion: Paul Ekman. The mechanism of human facial expression.(2003).
Chicago-Zitierstil (17. Ausg.)Ekman, Paul. "Duchenne and Facial Expression of Emotion: Paul Ekman." The Mechanism of Human Facial Expression.(2003) .
MLA-Zitierstil (8. Ausg.)Ekman, Paul. "Duchenne and Facial Expression of Emotion: Paul Ekman." The Mechanism of Human Facial Expression.(2003), .
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.