Johnson, D. G. (1981). Food and agricultural policy for the 1980s. American Enterprise Institute for Public Policy Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnson, D. Gale. Food and Agricultural Policy for the 1980s. Washington: American Enterprise Institute for Public Policy Research, 1981.
एमएलए (9वां संस्करण) प्रशस्ति पत्रJohnson, D. Gale. Food and Agricultural Policy for the 1980s. American Enterprise Institute for Public Policy Research, 1981.
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