Curley, R. (2012). Renewable and alternative energy. Britannica Educational Pub., in association with Rosen Educational Services.
Lua i Stíl Chicago (17ú heag.)Curley, Robert. Renewable and Alternative Energy. New York: Britannica Educational Pub., in association with Rosen Educational Services, 2012.
Lua MLA (9ú heag.)Curley, Robert. Renewable and Alternative Energy. Britannica Educational Pub., in association with Rosen Educational Services, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.