APA引文

Clark, J. G. (1990). The political economy of world energy: A twentieth-century perspective. New York: Harvester Wheatsheaf.

Trích dẫn kiểu Chicago

Clark, John G. The Political Economy of World Energy: A Twentieth-century Perspective. New York: Harvester Wheatsheaf, 1990.

MLA引文

Clark, John G. The Political Economy of World Energy: A Twentieth-century Perspective. New York: Harvester Wheatsheaf, 1990.

警告：這些引文格式不一定是100％准確.