Cita APA

Fridlund, A. J., & Fridlund, A. J. (1994). Human facial expression: An evolutionary view. San Diego, Calif.: Academic Press.

Citación estilo Chicago

Fridlund, Alan J., y Alan J. Fridlund. Human Facial Expression: An Evolutionary View. San Diego, Calif.: Academic Press, 1994.

Cita MLA

Fridlund, Alan J., y Alan J. Fridlund. Human Facial Expression: An Evolutionary View. San Diego, Calif.: Academic Press, 1994.