National Farmers' Union (U.S.). (1968). National union farmer. Farmers' Educational and Co-operative Union of America.
Chicago-referens (17:e uppl.)National Farmers' Union (U.S.). National Union Farmer. Marissa, Ill.: Farmers' Educational and Co-operative Union of America, 1968.
MLA-referens (8:e uppl.)National Farmers' Union (U.S.). National Union Farmer. Farmers' Educational and Co-operative Union of America, 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.