Dyfyniad APA

World Health Organization & World Health Organization. Vinyl chloride.

Dyfyniad Arddull Chicago

World Health Organization and World Health Organization. Vinyl Chloride.

Dyfyniad MLA

World Health Organization and World Health Organization. Vinyl Chloride.

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