Стиль цитування APA (7-ме видання)

United Nations Environment Programme & UNEP. Global Environment Outlook 3: Past, present and future perspectives. GEO-3: past, present and future perspectives.

Чикаго стиль цитування (17-те видання)

United Nations Environment Programme та UNEP. Global Environment Outlook 3: Past, Present and Future Perspectives. GEO-3: Past, Present and Future Perspectives. UNEP. EARTHSCAN.

Стиль цитування MLA (9-ме видання)

United Nations Environment Programme та UNEP. Global Environment Outlook 3: Past, Present and Future Perspectives. GEO-3: Past, Present and Future Perspectives.