CoopersmithS.The antecedents of self-esteem. San Francisco: W. H. Freeman & Co., 1967.
2.
CrattyB. J.Motor activity and the education of retardates. Philadelphia: Lea & Febiger, 1969.
3.
FretzB. R., & JohnsonW. R.Behavioral changes in children participating in a physical developmental clinic. Perceptual and Motor Skills, 1973, 36, 855–862.
4.
FretzB. R., JohnsonW. R., & JohnsonJ. A.Intellectual and perceptual motor development as a function of therapeutic play. Research Quarterly, 1969, 40, 687–691.
5.
JersildA. T.In search of self. New York: Teachers College Press, 1952.
6.
JohnsonW. R.A humanistic dimension of physical education. Journal of Health, Physical Education, Recreation, 1972, 43, 31–35.
7.
JohnsonW. R., & FretzB. R.Changes in perceptual-motor skills after a children's physical developmental program. Perceptual and Motor Skills, 1967, 24, 543.
8.
JohnsonW. R., FretzB. R., & JohnsonJ. A.Changes in self-concepts during a physical developmental program. The Research Quarterly, 1968, 39, 560–565.