Não informado. (1979). Foreign agriculture circular. U.S. Department of Agriculture, Foreign Agricultural Service.
Style de citation Chicago (17e éd.)Não informado. Foreign Agriculture Circular. Washington: U.S. Department of Agriculture, Foreign Agricultural Service, 1979.
Style de citation MLA (8e éd.)Não informado. Foreign Agriculture Circular. U.S. Department of Agriculture, Foreign Agricultural Service, 1979.
Attention : ces citations peuvent ne pas être correctes à 100%.