Style de citation APA

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

Style de citation Chicago

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

Style de citation MLA

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