Gaya APA

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

Gaya MLA

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