United Nations. Statistical Office. (1949). Population census handbook. [s.n.].
芝加哥风格引文United Nations. Statistical Office. Population Census Handbook. Lake Success, N. Y: [s.n.], 1949.
MLA引文United Nations. Statistical Office. Population Census Handbook. [s.n.], 1949.
警告：这些引文格式不一定是100％准确.