1. Arnheim, R. 1972.Visual Thinking. Berkeley, Los Angeles: University of California Press.
2. Bakker, D.J. 1972.Temporal Order in Disturbed Reading: Developmental and Neuropsychological Aspects in Normal and Reading-Retarded Children. Rotterdam: Rotterdam University Press.
3. Bakker, D.J. 1973. Hemispheric Specialization and Stages in the Learning-to-Read Process.Orton Society Bulletin 23:15–27.
4. Bakker, D.J. and P. Satz (eds.). 1970.Specific Reading Disability: Advances in Theory and Method. Rotterdam: Rotterdam University Press.
5. Benton, A.L. 1955.The Revised Visual Retention Test: Clinical and Experimental Applications. New York: Psychological Corp.