Heward, W. L. (2003). Exceptional children: An introduction to special education (7th ed.). Merrill.
Citazione stile Chigago Style (17a edizione)Heward, William L. Exceptional Children: An Introduction to Special Education. 7th ed. Upper Saddle River, N.J.: Merrill, 2003.
Citatione MLA (9a ed.)Heward, William L. Exceptional Children: An Introduction to Special Education. 7th ed. Merrill, 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.