APA引文

Ray, G. F. (1975). Western Europe and the energy crisi. London: Trade Policy Research Centre.

Trích dẫn kiểu Chicago

Ray, George F. Western Europe and the Energy Crisi. London: Trade Policy Research Centre, 1975.

MLA引文

Ray, George F. Western Europe and the Energy Crisi. London: Trade Policy Research Centre, 1975.

警告：這些引文格式不一定是100％准確.