Não informado. (1911). Engineering Experiment Station bulletin. Ohio Engineering Experiment Station.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Engineering Experiment Station Bulletin. Columbus, Ohio: Ohio Engineering Experiment Station, 1911.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Engineering Experiment Station Bulletin. Ohio Engineering Experiment Station, 1911.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.