Não informado. (1928). German Quarterly. American Association of Teachers of German.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. German Quarterly. Philadelphia, Pa: American Association of Teachers of German, 1928.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. German Quarterly. American Association of Teachers of German, 1928.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.