APA引文

(2005). enviromental standards and competitiveness of key economic sectors. united nations.

Chicago Style (17th ed.) Citation

Enviromental Standards and Competitiveness of Key Economic Sectors. new york: united nations, 2005.

MLA引文

Enviromental Standards and Competitiveness of Key Economic Sectors. united nations, 2005.

警告：這些引文格式不一定是100％准確.