World Energy Council Madrid, Spain. (1992). ُEnergy and the Economy: Energy costs, prices and competition.
Lua i Stíl Chicago (17ú heag.)World Energy Council Madrid, Spain. ُEnergy and the Economy: Energy Costs, Prices and Competition. Madrid, 1992.
Lua MLA (9ú heag.)World Energy Council Madrid, Spain. ُEnergy and the Economy: Energy Costs, Prices and Competition. 1992.
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