Dyfyniad APA

Vir Singh. (1998). Mountain ecosystems: A scenario of unsustainability. Indus publishing company.

Dyfyniad Arddull Chicago

Vir Singh. Mountain Ecosystems: A Scenario of Unsustainability. New delhi: Indus publishing company, 1998.

Dyfyniad MLA

Vir Singh. Mountain Ecosystems: A Scenario of Unsustainability. Indus publishing company, 1998.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.