Não informado. (2000). Bulletin of the Delaware University, Agricultural Experiment Station. Delaware Agricultural Experiment Station.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Delaware University, Agricultural Experiment Station. Newark, Del: Delaware Agricultural Experiment Station, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Delaware University, Agricultural Experiment Station. Delaware Agricultural Experiment Station, 2000.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.