Não informado. (1912). American teacher. American Federation of Teachers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. American Teacher. Washington: American Federation of Teachers, 1912.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. American Teacher. American Federation of Teachers, 1912.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.