APA (7. basım) Alıntı
United Nations Environment Programme. (2007). Global environment outlook: Environment for development, GEO 4. United Nations Environment Programme.
Chicago Style (17. basım) Atıf
United Nations Environment Programme. Global Environment Outlook: Environment for Development, GEO 4. Nairobi, Kenya: United Nations Environment Programme, 2007.
MLA (9th ed.) Atıf
United Nations Environment Programme. Global Environment Outlook: Environment for Development, GEO 4. United Nations Environment Programme, 2007.
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