Dyfyniad APA

World Health Organization. (1984). Guide Lines for Dringking - Water Quality. World Health Organisation.

Dyfyniad Arddull Chicago

World Health Organization. Guide Lines for Dringking - Water Quality. Geneva: World Health Organisation, 1984.

Dyfyniad MLA

World Health Organization. Guide Lines for Dringking - Water Quality. World Health Organisation, 1984.

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