APA aipamena

Najma,Heptulla. (1993). Environment protection in developing countries. Oxford & IBH Publishing Co.Pvt.Ltd.

Chicago Style aipamena

Najma,Heptulla. Environment Protection in Developing Countries. New Delhi: Oxford & IBH Publishing Co.Pvt.Ltd, 1993.

MLA aipamena

Najma,Heptulla. Environment Protection in Developing Countries. Oxford & IBH Publishing Co.Pvt.Ltd, 1993.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.