(2005). enviromental standards and competitiveness of key economic sectors. united nations.
Чикаго стиль цитування (17-те видання)Enviromental Standards and Competitiveness of Key Economic Sectors. new york: united nations, 2005.
Стиль цитування MLA (9-ме видання)Enviromental Standards and Competitiveness of Key Economic Sectors. united nations, 2005.