United Nations Industrial Development Organization. (1975). Guidelines for contracting for industrial projects in developing countries. United Nations.
芝加哥风格引文United Nations Industrial Development Organization. Guidelines for Contracting for Industrial Projects in Developing Countries. New York: United Nations, 1975.
MLA引文United Nations Industrial Development Organization. Guidelines for Contracting for Industrial Projects in Developing Countries. United Nations, 1975.
警告：这些引文格式不一定是100％准确.