Richmond, V. P. (1987). Nonverbal behavior in interpersonal relations. Prentice Hall.
Cita Chicago (17th ed.)Richmond, Virginia P. Nonverbal Behavior in Interpersonal Relations. Prentice Hall, 1987.
Cita MLA (9th ed.)Richmond, Virginia P. Nonverbal Behavior in Interpersonal Relations. Prentice Hall, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.