Dyfyniad APA

World Health Organization & World Health Organization. Selected synthetic organic fibres.

Dyfyniad Arddull Chicago

World Health Organization and World Health Organization. Selected Synthetic Organic Fibres.

Dyfyniad MLA

World Health Organization and World Health Organization. Selected Synthetic Organic Fibres.

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