Dyfyniad APA

Anil Kumar De & Arnab Kumar De. Textbook of environmental Science. Scientific International Pvt. Ltd.

Dyfyniad Arddull Chicago

Anil Kumar De and Arnab Kumar De. Textbook of Environmental Science. New Delhi: Scientific International Pvt. Ltd.

Dyfyniad MLA

Anil Kumar De and Arnab Kumar De. Textbook of Environmental Science. Scientific International Pvt. Ltd.

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