Cita APA (7a ed.)

Ekman, P. Expression and the nature of emotion: Paul Ekman. Approaches to emotion.(c 1984).

Cita Chicago Style (17a ed.)

Ekman, Paul. "Expression and the Nature of Emotion: Paul Ekman." Approaches to Emotion.(c 1984) .

Cita MLA (8a ed.)

Ekman, Paul. "Expression and the Nature of Emotion: Paul Ekman." Approaches to Emotion.(c 1984), .