India. Department of Environment. Environmental Information System (ENVIS). (1984). Directory of non-governmental organisations in environment. Environmental Information System (ENVIS), Department of Environment, Government of India.
Chicago-referens (17:e uppl.)India. Department of Environment. Environmental Information System (ENVIS). Directory of Non-governmental Organisations in Environment. New Delhi: Environmental Information System (ENVIS), Department of Environment, Government of India, 1984.
MLA-referens (9:e uppl.)India. Department of Environment. Environmental Information System (ENVIS). Directory of Non-governmental Organisations in Environment. Environmental Information System (ENVIS), Department of Environment, Government of India, 1984.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.