Negi, S. S. (1983). Contributions to Himalayan ecology. Bishen Singh Mahendra Pal Singh and Indian Journal of Forestry.
Chicago-referens (17:e uppl.)Negi, Sharad Singh. Contributions to Himalayan Ecology. Dehra Dun, India: Bishen Singh Mahendra Pal Singh and Indian Journal of Forestry, 1983.
MLA-referens (8:e uppl.)Negi, Sharad Singh. Contributions to Himalayan Ecology. Bishen Singh Mahendra Pal Singh and Indian Journal of Forestry, 1983.
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