Não informado. Outlook for U.S. Agricultural Exports. U.S. Department of Agriculture, Economic Research Service.
Citação do estilo Chicago (17ª ed.)Não informado. Outlook for U.S. Agricultural Exports. Washington: U.S. Department of Agriculture, Economic Research Service.
Citação MLA (8ª ed.)Não informado. Outlook for U.S. Agricultural Exports. U.S. Department of Agriculture, Economic Research Service.
Atenció: Aquestes cites poden no estar 100% correctes.