Dyfyniad APA

World Health Organization & World Health Organization. Selected non-heterocyclic polycyclic aromatic hydrocarbonsPolycyclic aromatic hydrocarbons, selected non-heterocyclic.

Dyfyniad Arddull Chicago

World Health Organization and World Health Organization. Selected Non-heterocyclic Polycyclic Aromatic HydrocarbonsPolycyclic Aromatic Hydrocarbons, Selected Non-heterocyclic.

Dyfyniad MLA

World Health Organization and World Health Organization. Selected Non-heterocyclic Polycyclic Aromatic HydrocarbonsPolycyclic Aromatic Hydrocarbons, Selected Non-heterocyclic.

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