Singh, V., & Sharma, M. (1998). Mountain ecosystems: A scenario of unsustainability. Indus publishing company.
استشهاد بنمط شيكاغوSingh, Vir, و M.L Sharma. Mountain Ecosystems: A Scenario of Unsustainability. New Delhi: Indus publishing company, 1998.
MLA استشهادSingh, Vir, و M.L Sharma. Mountain Ecosystems: A Scenario of Unsustainability. Indus publishing company, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.