Duff, L. (1997). The economics of governments and markets: New directions in European public policy. Longman.
芝加哥风格引文Duff, Lois. The Economics of Governments and Markets: New Directions in European Public Policy. London: Longman, 1997.
MLA引文Duff, Lois. The Economics of Governments and Markets: New Directions in European Public Policy. Longman, 1997.
警告：这些引文格式不一定是100％准确.