(2000). Air quality guidelines for Europe (Second edition.). World Health Organization Regional Office for Europe.
芝加哥风格引文Air Quality Guidelines for Europe. Second edition. Copenhagen, Denmark: World Health Organization Regional Office for Europe, 2000.
MLA引文Air Quality Guidelines for Europe. Second edition. World Health Organization Regional Office for Europe, 2000.
警告：这些引文格式不一定是100％准确.