Não informado. Foreign agriculture circular. U.S. Department of Agriculture, Foreign Agricultural Service.
Citação do estilo Chicago (17ª ed.)Não informado. Foreign Agriculture Circular. Washington: U.S. Department of Agriculture, Foreign Agricultural Service.
Citação MLA (8ª ed.)Não informado. Foreign Agriculture Circular. U.S. Department of Agriculture, Foreign Agricultural Service.
警告：這些引文格式不一定是100％准確.