Citazione APA

Singh, V., & Sharma, M. (1998). Mountain ecosystems: A scenario of unsustainability. Indus publishing company.

Stile di citazione Chicago

Singh, Vir, e M.L Sharma. Mountain Ecosystems: A Scenario of Unsustainability. New Delhi: Indus publishing company, 1998.

Citazione MLA

Singh, Vir, e M.L Sharma. Mountain Ecosystems: A Scenario of Unsustainability. Indus publishing company, 1998.