Johnson, D. G. (1973). Farm commodity programs: An opportunity for change. American Enterprise Institute for Public Policy Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnson, David Gale. Farm Commodity Programs: An Opportunity for Change. Washington: American Enterprise Institute for Public Policy Research, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रJohnson, David Gale. Farm Commodity Programs: An Opportunity for Change. American Enterprise Institute for Public Policy Research, 1973.
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