Robinson, H. B. (1965). The mentally retarded child: A psychological approach. McGraw-Hill.
Dyfyniad Arddull ChicagoRobinson, Halbert B. The Mentally Retarded Child: A Psychological Approach. New York: McGraw-Hill, 1965.
Dyfyniad MLARobinson, Halbert B. The Mentally Retarded Child: A Psychological Approach. McGraw-Hill, 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.