HemphillJ. K., GriffithsD. E., & FredricksenN.Administrative performance and personality.New York: Bureau of Publications, Teachers College, Columbia University, 1962.
2.
KatzR. L.Skills of an effective administrator.Harvard Business Review, 1955, 33, 33–42.
3.
The Council for Exceptional Children.Professional standards for personnel in the education of exceptional children.Washington, D.C.: CEG1966.