Himalayan Environment Trust (India). (1991). The Himalayas: Ecology & environment. Himalayan Environment Trust.
Chicago-referens (17:e uppl.)Himalayan Environment Trust (India). The Himalayas: Ecology & Environment. New Delhi: Himalayan Environment Trust, 1991.
MLA-referens (8:e uppl.)Himalayan Environment Trust (India). The Himalayas: Ecology & Environment. Himalayan Environment Trust, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.