Não informado. Outlook for U.S. Agricultural Exports. U.S. Department of Agriculture, Economic Research Service.
Chicago-referens (17:e uppl.)Não informado. Outlook for U.S. Agricultural Exports. Washington: U.S. Department of Agriculture, Economic Research Service.
MLA-referens (8:e uppl.)Não informado. Outlook for U.S. Agricultural Exports. U.S. Department of Agriculture, Economic Research Service.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.