United Nations. Department of Economic and Social Affairs. (1970). Methods of measuring internal migration. United Nations.
芝加哥风格引文United Nations. Department of Economic and Social Affairs. Methods of Measuring Internal Migration. New York: United Nations, 1970.
MLA引文United Nations. Department of Economic and Social Affairs. Methods of Measuring Internal Migration. United Nations, 1970.
警告：这些引文格式不一定是100％准确.