World Health Organization. Regional Office for Europe. (2000). Air quality guidelines for Europe (2nd ed.). World Health Organization, Regional Office for Europe.
Chicago-referens (17:e uppl.)World Health Organization. Regional Office for Europe. Air Quality Guidelines for Europe. 2nd ed. Copenhagen: World Health Organization, Regional Office for Europe, 2000.
MLA-referens (9:e uppl.)World Health Organization. Regional Office for Europe. Air Quality Guidelines for Europe. 2nd ed. World Health Organization, Regional Office for Europe, 2000.
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