Open University, Boyle, G., Everett, B., & Ramage, J. (2003). Energy systems and sustainability. Oxford University Press, in association with the Open University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOpen University, Godfrey Boyle, Bob Everett, और Janet Ramage. Energy Systems and Sustainability. Oxford ; New York: Oxford University Press, in association with the Open University, 2003.
एमएलए (8वां संस्करण) प्रशस्ति पत्रOpen University, et al. Energy Systems and Sustainability. Oxford University Press, in association with the Open University, 2003.
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