Croy, G. H. (2008). The energy trail -- where it is leading: An essay on what we can expect in the not too distant future. World Scientific.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCroy, George H. The Energy Trail -- Where It Is Leading: An Essay on What We Can Expect in the Not Too Distant Future. Singapore: World Scientific, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCroy, George H. The Energy Trail -- Where It Is Leading: An Essay on What We Can Expect in the Not Too Distant Future. World Scientific, 2008.
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