United nations. (1991). Desertification control bulletin: A Bulletin of world Events in the control of desertification, restoration of degraded lands and reforestation. UN.
Цитирование в стиле Чикаго (17-е изд.)United nations. Desertification Control Bulletin: A Bulletin of World Events in the Control of Desertification, Restoration of Degraded Lands and Reforestation. Nairobi: UN, 1991.
Цитирование MLA (8-е изд.)United nations. Desertification Control Bulletin: A Bulletin of World Events in the Control of Desertification, Restoration of Degraded Lands and Reforestation. UN, 1991.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.