1. Allen, R. M., & Jefferson, T. W. Psychological evaluation of the cerebral palsied person. Springfield, Ill.: Charles C Thomas, 1962.
2. American Association on Mental Deficiency. AAMD adaptive behavior scale for children and adults. Washington, D.C.: American Association on Mental Deficiency, 1974.
3. Andrews, G., Platt, L. J., Quinn, P. T., & Nelson, P. D. An assessment of the status of adults with cerebral palsy. Developmental Medicine and Child Neurology, 1977, 19 (6), 803–810.
4. Ball, T. S., Combs, T., Rugh, J., & Neptune, R. Automated range of motion training with two cerebral palsied retarded young men. Mental Retardation, 1977, 15 (4), 47–50.
5. Bayley, N. Bayley scales of infant development. New York: The Psychological Corporation, 1969.