International Energy Agency. (2013). Resources to reserves 2013: Oil, gas and coal technologies for the energy markets of the future. Organisation for Economic Co-operation and Development : International Energy Agency.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Energy Agency. Resources to Reserves 2013: Oil, Gas and Coal Technologies for the Energy Markets of the Future. Paris, France: Organisation for Economic Co-operation and Development : International Energy Agency, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रInternational Energy Agency. Resources to Reserves 2013: Oil, Gas and Coal Technologies for the Energy Markets of the Future. Organisation for Economic Co-operation and Development : International Energy Agency, 2013.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.