Não informado. (2002). Rural America. U.S. Department of Agriculture, Economic Research Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Rural America. Washington: U.S. Department of Agriculture, Economic Research Service, 2002.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Rural America. U.S. Department of Agriculture, Economic Research Service, 2002.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.