Dyfyniad APA

Harrison, R. M. (2012). Pollution: Causes, Effects and Control Fourth Edition. The Royal Society of Chemistry.

Dyfyniad Arddull Chicago

Harrison, Roy M. Pollution: Causes, Effects and Control Fourth Edition. The Royal Society of Chemistry, 2012.

Dyfyniad MLA

Harrison, Roy M. Pollution: Causes, Effects and Control Fourth Edition. The Royal Society of Chemistry, 2012.

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