Heward, W. (2000). Exceptional children: An introduction to special education (6th.ed.). Merrill.
Citazione stile Chigago Style (17a edizione)Heward, William. Exceptional Children: An Introduction to Special Education. 6th.ed. New Jersey: Merrill, 2000.
Citatione MLA (9a ed.)Heward, William. Exceptional Children: An Introduction to Special Education. 6th.ed. Merrill, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.