World Energy Council Madrid, Spain. (1992). ُEnergy and the Economy: Energy costs, prices and competition.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Energy Council Madrid, Spain. ُEnergy and the Economy: Energy Costs, Prices and Competition. Madrid, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWorld Energy Council Madrid, Spain. ُEnergy and the Economy: Energy Costs, Prices and Competition. 1992.
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