1. Bettis, M. C., and Roberts, R. E.: The mental health manpower dilemma. Ment. Hyg., 59(2): 163–175, April, 1969.
2. Caplan, G.: Principles of Preventive Psychiatry, pp. 216–219. Basic Books, New York. 1964.
3. Likert, R.: The Human Organization. McGraw-Hill. New York. 1967.
4. McGregor, D.: The Human Side of Enterprise. McGraw-Hill. New York. 1960.
5. Baker, F., and Schulberg, H. C.: The development of a community mental health ideology scale. Commun. Ment. Health J., 3(3): 216–225, 1967.