Não informado. The Nation's Schools. Nations Schools Publishing.
Chicago-Zitierstil (17. Ausg.)Não informado. The Nation's Schools. Chicago, Ill: Nations Schools Publishing.
MLA-Zitierstil (8. Ausg.)Não informado. The Nation's Schools. Nations Schools Publishing.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.