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.
Lua i Stíl Chicago (17ú heag.)Croy, 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.
Lua MLA (8ú heag.)Croy, 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.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.