Não informado. (1999). Topics in early childhood special education. Pro-Ed.
Chicago-Zitierstil (17. Ausg.)Não informado. Topics in Early Childhood Special Education. Austin, Tex: Pro-Ed, 1999.
MLA-Zitierstil (8. Ausg.)Não informado. Topics in Early Childhood Special Education. Pro-Ed, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.