United Nations. Economic Commission for Europe. (1973). Long-term aspects of plans and programmes: Papers presented to the ninth session of senior economic advisers to ECE governments. United Nations.
芝加哥风格引文United Nations. Economic Commission for Europe. Long-term Aspects of Plans and Programmes: Papers Presented to the Ninth Session of Senior Economic Advisers to ECE Governments. New York: United Nations, 1973.
MLA引文United Nations. Economic Commission for Europe. Long-term Aspects of Plans and Programmes: Papers Presented to the Ninth Session of Senior Economic Advisers to ECE Governments. United Nations, 1973.
警告：这些引文格式不一定是100％准确.