Não informado. (1936). Agricultural Statistics. U.S. Department of Agriculture.
Style de citation Chicago (17e éd.)Não informado. Agricultural Statistics. Washington: U.S. Department of Agriculture, 1936.
Style de citation MLA (8e éd.)Não informado. Agricultural Statistics. U.S. Department of Agriculture, 1936.
Attention : ces citations peuvent ne pas être correctes à 100%.