(2000). Major highlights of DENR accomplishments (July 1998-December 1999). Journal on Environment, Energy and Minerals.
Chicago-referens (17:e uppl.)"Major Highlights of DENR Accomplishments (July 1998-December 1999)." Journal on Environment, Energy and Minerals 2000.
MLA-referens (9:e uppl.)"Major Highlights of DENR Accomplishments (July 1998-December 1999)." Journal on Environment, Energy and Minerals, 2000.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.