Não informado. (1987). The Journal of Agricultural Economics Research. U.S. Department of Agriculture.
Style de citation Chicago (17e éd.)Não informado. The Journal of Agricultural Economics Research. Washington: U.S. Department of Agriculture, 1987.
Style de citation MLA (8e éd.)Não informado. The Journal of Agricultural Economics Research. U.S. Department of Agriculture, 1987.
Attention : ces citations peuvent ne pas être correctes à 100%.