Não informado. (1912). American teacher. American Federation of Teachers.
Chicago-referens (17:e uppl.)Não informado. American Teacher. Washington: American Federation of Teachers, 1912.
MLA-referens (8:e uppl.)Não informado. American Teacher. American Federation of Teachers, 1912.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.