APA সাইটেশন

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

শিকাগো স্টাইলে সাইটেশন

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

এমএলএ সাইটেশন

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