Não informado. (1975). Agricultural Outlook. U.S. Department of Agriculture, Economic Research Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Outlook. Washington: U.S. Department of Agriculture, Economic Research Service, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Outlook. U.S. Department of Agriculture, Economic Research Service, 1975.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.