United Nations. (1972). Catalogue of periodicals, annuals and special series currently received at the United Nations Library. s.n.
芝加哥风格引文United Nations. Catalogue of Periodicals, Annuals and Special Series Currently Received at the United Nations Library. Geneva: s.n, 1972.
MLA引文United Nations. Catalogue of Periodicals, Annuals and Special Series Currently Received at the United Nations Library. s.n, 1972.
警告：这些引文格式不一定是100％准确.