Dyfyniad APA

Karpagam,M. (1991). Environmental economics: A text book. Sterling Publishers Pvt. Ltd.

Dyfyniad Arddull Chicago

Karpagam,M. Environmental Economics: A Text Book. New Delhi: Sterling Publishers Pvt. Ltd, 1991.

Dyfyniad MLA

Karpagam,M. Environmental Economics: A Text Book. Sterling Publishers Pvt. Ltd, 1991.

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