Não informado. (1933). American Physics Teacher. American Association of Physics Teachers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. American Physics Teacher. New York: American Association of Physics Teachers, 1933.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. American Physics Teacher. American Association of Physics Teachers, 1933.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.