United Nations Environment Programme & UNEP. Global Environment Outlook 3: Past, present and future perspectives. GEO-3: past, present and future perspectives.
Citazione stile Chigago Style (17a edizione)United Nations Environment Programme e UNEP. Global Environment Outlook 3: Past, Present and Future Perspectives. GEO-3: Past, Present and Future Perspectives. UNEP. EARTHSCAN.
Citatione MLA (9a ed.)United Nations Environment Programme e UNEP. Global Environment Outlook 3: Past, Present and Future Perspectives. GEO-3: Past, Present and Future Perspectives.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.