Curley, R. (2012). Renewable and alternative energy. Britannica Educational Pub., in association with Rosen Educational Services.
Chicago-referens (17:e uppl.)Curley, Robert. Renewable and Alternative Energy. New York: Britannica Educational Pub., in association with Rosen Educational Services, 2012.
MLA-referens (9:e uppl.)Curley, Robert. Renewable and Alternative Energy. Britannica Educational Pub., in association with Rosen Educational Services, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.