Não informado. (1968). Teaching exceptional children. Council for Exceptional Children.
Chicago-Zitierstil (17. Ausg.)Não informado. Teaching Exceptional Children. Reston, Va: Council for Exceptional Children, 1968.
MLA-Zitierstil (8. Ausg.)Não informado. Teaching Exceptional Children. Council for Exceptional Children, 1968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.