Hallahan, D. P., & Kauffman, J. M. (1986). Exceptional children: Introduction to special education (3rd ed.). Prentice-Hall.

Hallahan, Daniel P., and James M. Kauffman. Exceptional Children: Introduction to Special Education. 3rd ed. Englewood Cliffs, N.J.: Prentice-Hall, 1986.

Hallahan, Daniel P., and James M. Kauffman. Exceptional Children: Introduction to Special Education. 3rd ed. Prentice-Hall, 1986.