Dyfyniad APA

Metcalfe, S. (2005). Atmospheric Pollution and environmental change. Hodder Arnold.

Dyfyniad Arddull Chicago

Metcalfe, Sarah. Atmospheric Pollution and Environmental Change. London: Hodder Arnold, 2005.

Dyfyniad MLA

Metcalfe, Sarah. Atmospheric Pollution and Environmental Change. Hodder Arnold, 2005.

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