World Health Organization. (2000). Air quality guidelines for europe (2nd-ed.). World Health Organization.
Цитирование в стиле Чикаго (17-е изд.)World Health Organization. Air Quality Guidelines for Europe. 2nd-ed. Copenhagen: World Health Organization, 2000.
Цитирование MLA (8-е изд.)World Health Organization. Air Quality Guidelines for Europe. 2nd-ed. World Health Organization, 2000.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.