United Nations Symposium on State Petroleum Enterprises in Developing Countries Vienna, Austria. (1980). State petroleum enterprises in developing countries. Published for the United Nations [by] Pergamon Press.
芝加哥风格引文United Nations Symposium on State Petroleum Enterprises in Developing Countries Vienna, Austria. State Petroleum Enterprises in Developing Countries. New York: Published for the United Nations [by] Pergamon Press, 1980.
MLA引文United Nations Symposium on State Petroleum Enterprises in Developing Countries Vienna, Austria. State Petroleum Enterprises in Developing Countries. Published for the United Nations [by] Pergamon Press, 1980.
警告：这些引文格式不一定是100％准确.