United Nations Industrial Development Organization. (1978). Manual for the preparation of industrial feasibility studies. United Nations.
芝加哥风格引文United Nations Industrial Development Organization. Manual for the Preparation of Industrial Feasibility Studies. New York: United Nations, 1978.
MLA引文United Nations Industrial Development Organization. Manual for the Preparation of Industrial Feasibility Studies. United Nations, 1978.
警告：这些引文格式不一定是100％准确.