APA (7 वां संस्करण) प्रशस्ति पत्र
American Agricultural Economics Association, ebrary, Inc, & Martin, L. R. (1981). Economics of welfare, rural development and natural resources in agriculture 1940s to 1970s. University of Minnesota Press for the American Agricultural Economics Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
American Agricultural Economics Association, Inc ebrary, और Lee R. Martin. Economics of Welfare, Rural Development and Natural Resources in Agriculture 1940s to 1970s. Minneapolis: University of Minnesota Press for the American Agricultural Economics Association, 1981.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
American Agricultural Economics Association, et al. Economics of Welfare, Rural Development and Natural Resources in Agriculture 1940s to 1970s. University of Minnesota Press for the American Agricultural Economics Association, 1981.
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