References
- Ansbacher, Heinz and Rowena Heinz. The Individual Psychology of Alfred Adler (New York: Basic Books, Inc., 1956), pp. 94–96.
- Dreikurs, Rudolf. Psychology in the Classroom (New York: Harper and Brothers, 1957).
- Kuhn, Manford H., and McPartland Thomas H..“An Empirical Investigation of Self-Attitudes,” American Sociological Review,XIX, No. 1 (February 1954), pp. 68–76.
- Sand, Ole, Con Davis, Rose Lammel and Thomas Stone. “Components of the Curriculum,” Review of Educational Research,XXX, No. 3, (June 1960), pp. 226–245.