Dyfyniad APA

Kumar, H. (1998). Environmental pollution and waste management. M.D..

Dyfyniad Arddull Chicago

Kumar, H.D. Environmental Pollution and Waste Management. New Delhi: M.D., 1998.

Dyfyniad MLA

Kumar, H.D. Environmental Pollution and Waste Management. M.D., 1998.

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