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.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)United Nations. Economic Commission for Europe, Johan Sliggers, ба Willem Kakebeeke. Clearing the Air: 25 Years of the Convention on Long-range Transboundary Air Pollution. New York: United Nations, 2004.
MLA -ийн эшлэл (9 дэх хэвлэлт)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.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.