Não informado. (2004). Fossil energy update. Energy Research and Development Administration, Technical Information Center.
Chicago-referens (17:e uppl.)Não informado. Fossil Energy Update. Oak Ridge, Tenn: Energy Research and Development Administration, Technical Information Center, 2004.
MLA-referens (8:e uppl.)Não informado. Fossil Energy Update. Energy Research and Development Administration, Technical Information Center, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.