United Nations Environment Programme. (2001). India: State of the environment 2001. United Nations Environment Programme.
Chicago-referens (17:e uppl.)United Nations Environment Programme. India: State of the Environment 2001. Bangkok: United Nations Environment Programme, 2001.
MLA-referens (8:e uppl.)United Nations Environment Programme. India: State of the Environment 2001. United Nations Environment Programme, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.