(2005). enviromental standards and competitiveness of key economic sectors. united nations.
Lua i Stíl Chicago (17ú heag.)Enviromental Standards and Competitiveness of Key Economic Sectors. new york: united nations, 2005.
Lua MLA (9ú heag.)Enviromental Standards and Competitiveness of Key Economic Sectors. united nations, 2005.
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