United Nations. Economic Commission for Europe. The coal situation in Europe in ... and future prospects. United Nations.
Citazione stile Chigago Style (17a edizione)United Nations. Economic Commission for Europe. The Coal Situation in Europe in ... and Future Prospects. Geneva: United Nations.
Citatione MLA (8a ed.)United Nations. Economic Commission for Europe. The Coal Situation in Europe in ... and Future Prospects. United Nations.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.