(2005). enviromental standards and competitiveness of key economic sectors. united nations.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Enviromental Standards and Competitiveness of Key Economic Sectors. new york: united nations, 2005.
MLA -ийн эшлэл (9 дэх хэвлэлт)Enviromental Standards and Competitiveness of Key Economic Sectors. united nations, 2005.