Não informado. (1962). Farm index. U.S. Department of Agriculture, Economic Research Service.
Style de citation Chicago (17e éd.)Não informado. Farm Index. Washington: U.S. Department of Agriculture, Economic Research Service, 1962.
Style de citation MLA (8e éd.)Não informado. Farm Index. U.S. Department of Agriculture, Economic Research Service, 1962.
Attention : ces citations peuvent ne pas être correctes à 100%.