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2. Bass, B. M. (1981). Stodgill's handbook of leadership (rev. ed.). New York: Free Press.
3. Mental health consultation, community mental health, and population-oriented psychiatry;Caplan,1993
4. Teachers' perceptions of consultation as a function of consultants' use of expert and referent power. (Doctoral dissertation, University of Pennsylvania, 1982);Cienki;Dissertation Abstracts International,1982
5. Statistical power analysis for the behavioral sciences;Cohen,1988