Não informado. (1991). Food, Nutrition and Agriculture. Food and Agriculture Organization of the United Nations.
Citação do estilo Chicago (17ª ed.)Não informado. Food, Nutrition and Agriculture. Roma: Food and Agriculture Organization of the United Nations, 1991.
Citação MLA (8ª ed.)Não informado. Food, Nutrition and Agriculture. Food and Agriculture Organization of the United Nations, 1991.
警告：這些引文格式不一定是100％准確.