APA (7 वां संस्करण) प्रशस्ति पत्र

International energy agency. (2002). World energy outlook 2002. Organisation economic cooperation and development.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

International energy agency. World Energy Outlook 2002. France: Organisation economic cooperation and development, 2002.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

International energy agency. World Energy Outlook 2002. Organisation economic cooperation and development, 2002.

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