Dyfyniad APA

(1984). Guidlines for drinking-water quality: Health criteria and other supporting information. World Health Organization.

Dyfyniad Arddull Chicago

Guidlines for Drinking-water Quality: Health Criteria and Other Supporting Information. Geneva: World Health Organization, 1984.

Dyfyniad MLA

Guidlines for Drinking-water Quality: Health Criteria and Other Supporting Information. World Health Organization, 1984.

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