Clark, J. G. (1990). The political economy of world energy: A twentieth-century perspective. New York: Harvester Wheatsheaf.
Trích dẫn kiểu ChicagoClark, John G. The Political Economy of World Energy: A Twentieth-century Perspective. New York: Harvester Wheatsheaf, 1990.
MLA CitationClark, John G. The Political Economy of World Energy: A Twentieth-century Perspective. New York: Harvester Wheatsheaf, 1990.
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