Não informado. (2001). Bibliography of Agriculture. U.S. Department of Agriculture.
Style de citation Chicago (17e éd.)Não informado. Bibliography of Agriculture. Washington: U.S. Department of Agriculture, 2001.
Style de citation MLA (8e éd.)Não informado. Bibliography of Agriculture. U.S. Department of Agriculture, 2001.
Attention : ces citations peuvent ne pas être correctes à 100%.