United Nations. Department of Social Affairs. (1949). Problems of migration statistics. United Nations, Department of Social Affairs.
芝加哥风格引文United Nations. Department of Social Affairs. Problems of Migration Statistics. Lake Success, N.Y: United Nations, Department of Social Affairs, 1949.
MLA引文United Nations. Department of Social Affairs. Problems of Migration Statistics. United Nations, Department of Social Affairs, 1949.
警告：这些引文格式不一定是100％准确.