United Nations Conference on Trade and Development. (2012). Commodities at a glance: Special issue on food security. United Nations.
芝加哥风格引文United Nations Conference on Trade and Development. Commodities at a Glance: Special Issue on Food Security. New York: United Nations, 2012.
MLA引文United Nations Conference on Trade and Development. Commodities at a Glance: Special Issue on Food Security. United Nations, 2012.
警告：这些引文格式不一定是100％准确.