United Nations. Statistical Office. (1950). Studies in methods (no. 1.). [s.n.].
芝加哥风格引文United Nations. Statistical Office. Studies in Methods. no. 1. New York: [s.n.], 1950.
MLA引文United Nations. Statistical Office. Studies in Methods. no. 1. [s.n.], 1950.
警告：这些引文格式不一定是100％准确.