Dyfyniad APA

Viegas, P. (1989). Impact of environmental degradation on people. Indian social institute.

Dyfyniad Arddull Chicago

Viegas, Philip. Impact of Environmental Degradation on People. New Delhi: Indian social institute, 1989.

Dyfyniad MLA

Viegas, Philip. Impact of Environmental Degradation on People. Indian social institute, 1989.

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