United Nations Environment Programme & Division of Early Warning and Assessment. (2006). Global deserts outlook. United Nations Environment Programme, Division of Early Warning and Assessment (DEWA).
Παραπομπή σε μορφή Chicago (17η εκδ.)United Nations Environment Programme και Division of Early Warning and Assessment. Global Deserts Outlook. Nairobi, Kenya: United Nations Environment Programme, Division of Early Warning and Assessment (DEWA), 2006.
Παραπομπή σε μορφή MLA (9th εκδ.)United Nations Environment Programme και Division of Early Warning and Assessment. Global Deserts Outlook. United Nations Environment Programme, Division of Early Warning and Assessment (DEWA), 2006.
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