APA

Ekman P., Friesen W. V. & Ellsworth P. (1972). Emotion in the human face: guide-lines for research and an integration of findings. New York: Pergamon Press.

Chicago

Ekman Paul, Friesen Wallace V and Ellsworth Phoebe. 1972. Emotion in the human face: guide-lines for research and an integration of findings. New York: Pergamon Press.

Harvard

Ekman P., Friesen W. V. and Ellsworth P. (1972). Emotion in the human face: guide-lines for research and an integration of findings. New York: Pergamon Press.

MLA

Ekman Paul, Friesen Wallace V and Ellsworth Phoebe. Emotion in the human face: guide-lines for research and an integration of findings. New York: Pergamon Press. 1972.