Dyfyniad APA

Ranjan Kumar. Environment and ecology. Arihant Publications(India) Ltd.

Dyfyniad Arddull Chicago

Ranjan Kumar. Environment and Ecology. India: Arihant Publications(India) Ltd.

Dyfyniad MLA

Ranjan Kumar. Environment and Ecology. Arihant Publications(India) Ltd.

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