United Nations. Economic Commission for Europe, Sliggers, J., & Kakebeeke, W. (2004). Clearing the air: 25 years of the Convention on Long-range Transboundary Air Pollution. United Nations.
Цитирование в стиле Чикаго (17-е изд.)United Nations. Economic Commission for Europe, Johan Sliggers, и Willem Kakebeeke. Clearing the Air: 25 Years of the Convention on Long-range Transboundary Air Pollution. New York: United Nations, 2004.
Цитирование MLA (9-е изд.)United Nations. Economic Commission for Europe, et al. Clearing the Air: 25 Years of the Convention on Long-range Transboundary Air Pollution. United Nations, 2004.
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