Não informado. (1968). Foreign agriculture. U.S. Department of Agriculture, Foreign Agricultural Service.
Style de citation Chicago (17e éd.)Não informado. Foreign Agriculture. Washington: U.S. Department of Agriculture, Foreign Agricultural Service, 1968.
Style de citation MLA (8e éd.)Não informado. Foreign Agriculture. U.S. Department of Agriculture, Foreign Agricultural Service, 1968.
Attention : ces citations peuvent ne pas être correctes à 100%.