Citazione Stile APA (7a Edizione)

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.