(2005). enviromental standards and competitiveness of key economic sectors. united nations.
Citazione stile Chigago Style (17a edizione)Enviromental Standards and Competitiveness of Key Economic Sectors. new york: united nations, 2005.
Citatione MLA (9a ed.)Enviromental Standards and Competitiveness of Key Economic Sectors. united nations, 2005.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.