United Nations Environment Programme. (2007). Climate action 2007. UNEP Sustainable Development International.
Citazione stile Chigago Style (17a edizione)United Nations Environment Programme. Climate Action 2007. London, England: UNEP Sustainable Development International, 2007.
Citatione MLA (9a ed.)United Nations Environment Programme. Climate Action 2007. UNEP Sustainable Development International, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.