Cita APA (7a ed.)

Russell, J. A., & Bullock, M. (1986). Fuzzy concepts and the perception of emotion in facial expressions. [s.n.].

Cita Chicago Style (17a ed.)

Russell, James A., y Merry Bullock. Fuzzy Concepts and the Perception of Emotion in Facial Expressions. [S.l.]: [s.n.], 1986.

Cita MLA (9a ed.)

Russell, James A., y Merry Bullock. Fuzzy Concepts and the Perception of Emotion in Facial Expressions. [s.n.], 1986.