Gaya APA

Heward, W, L., D., I, O, M. (). Exceptional children an introductory survey of special education . London:: London: Merrill; 1988.

Gaya MLA

Heward, William, L.., D., I., Orlansky,, Michael. "Exceptional children an introductory survey of special education". London:: London: Merrill; 1988, . Text.