Não informado. (1928). German Quarterly. American Association of Teachers of German.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. German Quarterly. Philadelphia, Pa: American Association of Teachers of German, 1928.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. German Quarterly. American Association of Teachers of German, 1928.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.