APA-referens (7:e uppl.)

Não informado. The Nation's Schools. Nations Schools Publishing.

Chicago-referens (17:e uppl.)

Não informado. The Nation's Schools. Chicago, Ill: Nations Schools Publishing.

MLA-referens (8:e uppl.)

Não informado. The Nation's Schools. Nations Schools Publishing.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.