1. Creativity: The Magic Synthesis;Arieti,1976
2. Discriminations and switching learning in normal familial retarded, and organic retarded children;Balla;Journal of Abnormal and Social Psychology,1964
3. Music and Your Mind;Bonny,1973
4. An Essay on Man;Cassierer,1944
5. Learned helplessness in institutions;DeVillis;Mental Retardation,1977