APA استشهاد

Duff,Lois. (1997). The economics of governments and markets: New directions in European public policy. Longman.

استشهاد بنمط شيكاغو

Duff,Lois. The Economics of Governments and Markets: New Directions in European Public Policy. London: Longman, 1997.

MLA استشهاد

Duff,Lois. The Economics of Governments and Markets: New Directions in European Public Policy. Longman, 1997.