Gaya APA

Heward, W, L., Orlansky, M, D. (1988). Exceptional children : an introductory survey of special education (3rd ed.). Columbus: Merrill Pub..

Gaya MLA

Heward, William, L.., Orlansky, Michael, D.. "Exceptional children : an introductory survey of special education". 3rd ed. Columbus: Merrill Pub., 1988. Text.