United Nations. Economic Commission for Europe. (1991). Energy reforms in Central and Eastern Europe: The first year. United Nations.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)United Nations. Economic Commission for Europe. Energy Reforms in Central and Eastern Europe: The First Year. New York: United Nations, 1991.
MLA -ийн эшлэл (9 дэх хэвлэлт)United Nations. Economic Commission for Europe. Energy Reforms in Central and Eastern Europe: The First Year. United Nations, 1991.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.