Não informado. The Nation's Schools. Nations Schools Publishing.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. The Nation's Schools. Chicago, Ill: Nations Schools Publishing.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. The Nation's Schools. Nations Schools Publishing.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.