1. (1969 Social interaction. New York, Atherton Press.
2. , , and (1970) The communication of inferior and superior attitudes by verbal and non-verbal signals. Brit. J. soc. clin. Psychol. (in press), and French version in B. Psychol. (in press).
3. Toward a theory of schizophrenia
4. (1964) The communication of emotional meaning. New York, McGraw-Hill.
5. and (1967) Origin, usage and coding: The basis for five categories of non-verbal behavior. (Roneo).