Rujukan

Asiah Hj. Ahmad (2012). Mengenal dan menangani orang kurang upaya. Kuala Lumpur: Dewan Bahasa dan Pustaka.

Heward, W.L. (1996). Exceptional children: an introduction To special education(5th ed).

Englewood Cliffs, N.J.: American Psychological Association. Kirk, S.A., Gallagher, J.J., &Anatasiow, N.J. (1993). Educating exceptional children (7thed.). Boston: Allyn and Bacon.

Marschack, M, & Lang, H. G. (2002). Educating deaf students. New York: Oxford Unversity Press