1. Hill , W. F. A supplement to HIM monograph Los Angeles University of Southern California, Youth Studies Center
2. Hill , W. F. HIM: Hill Interaction Matrix scoring manual Los Angeles University of Southern California, Youth Studies Center
3. Interaction patterns and themes of male, female and mixed groups;Aries;Small Group Behavior,1976
4. Status characteristics and social interaction;Berger;American Sociological Review,1972