Cita APA (7a ed.)
United Nations Environment Programme & UNEP. Global Environment Outlook 3: Past, present and future perspectives. GEO-3: past, present and future perspectives.
Cita Chicago Style (17a ed.)
United Nations Environment Programme y UNEP. Global Environment Outlook 3: Past, Present and Future Perspectives. GEO-3: Past, Present and Future Perspectives. UNEP. EARTHSCAN.
Cita MLA (9a ed.)
United Nations Environment Programme y UNEP. Global Environment Outlook 3: Past, Present and Future Perspectives. GEO-3: Past, Present and Future Perspectives.
Precaución: Estas citas no son 100% exactas.