Não informado. (1968). Foreign agriculture. U.S. Department of Agriculture, Foreign Agricultural Service.
Cita Chicago Style (17a ed.)Não informado. Foreign Agriculture. Washington: U.S. Department of Agriculture, Foreign Agricultural Service, 1968.
Cita MLA (8a ed.)Não informado. Foreign Agriculture. U.S. Department of Agriculture, Foreign Agricultural Service, 1968.
Precaución: Estas citas no son 100% exactas.