APA (7e ed.) Bronvermelding

Ekman, P. Duchenne and facial expression of emotion: Paul Ekman. The mechanism of human facial expression.(2003).

Chicago (17e ed.) Bronvermelding

Ekman, Paul. "Duchenne and Facial Expression of Emotion: Paul Ekman." The Mechanism of Human Facial Expression.(2003) .

MLA (8e ed.) Bronvermelding

Ekman, Paul. "Duchenne and Facial Expression of Emotion: Paul Ekman." The Mechanism of Human Facial Expression.(2003), .

Let op: Deze citaties zijn niet altijd 100% accuraat.