Não informado. (1975). Agricultural Libraries Information Notes. Technical Information Systems, National Agricultural Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Libraries Information Notes. Beltsville, Md: Technical Information Systems, National Agricultural Library, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Libraries Information Notes. Technical Information Systems, National Agricultural Library, 1975.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.