ROBINSON, H. B., & ROBINSON, N. M. (1965). The mentally retarded child: A psychological approach. McGraw-Hill.

ROBINSON, Halbert B., and Nancy M. ROBINSON. The Mentally Retarded Child: A Psychological Approach. New York: McGraw-Hill, 1965.

ROBINSON, Halbert B., and Nancy M. ROBINSON. The Mentally Retarded Child: A Psychological Approach. McGraw-Hill, 1965.