Não informado. (1928). American school and university. Educational Division of North American.
Chicago-referens (17:e uppl.)Não informado. American School and University. Philadelphia, Pa: Educational Division of North American, 1928.
MLA-referens (8:e uppl.)Não informado. American School and University. Educational Division of North American, 1928.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.