National Farmers' Union (U.S.). (1968). National union farmer. Farmers' Educational and Co-operative Union of America.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Farmers' Union (U.S.). National Union Farmer. Marissa, Ill.: Farmers' Educational and Co-operative Union of America, 1968.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Farmers' Union (U.S.). National Union Farmer. Farmers' Educational and Co-operative Union of America, 1968.
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