1. Hornsby B.Overcoming Dyslexia: A straight forward guide for families and teachers. Singapore : PG Publishers Pvt. Ltd. 1994.
2. Hammil DD. On defining learning disabilities An emerging consensus.J Learn Disabil 1990; 23: 73–84.
3. Rutter M. Prevalence and types of Dyslexia. In Benton AL, Pearl D, eds.Dyslexia, An Appraisal of Current Knowledge. New York: Oxford University Press, 1978; 3–28.
4. Erenberg G. Learning Disabilities; An overwiew.Seminars in Neurology 1991; 11: 1–6.
5. Rutter M, Tizard J, Whitemore K. Education, health, and behaviour. London: Longman, 1970.