United Nations Conference on Trade and Development. (1974). The maritime transportation of iron ore: Report. United Nations.
芝加哥风格引文United Nations Conference on Trade and Development. The Maritime Transportation of Iron Ore: Report. New York: United Nations, 1974.
MLA引文United Nations Conference on Trade and Development. The Maritime Transportation of Iron Ore: Report. United Nations, 1974.
警告：这些引文格式不一定是100％准确.