World Health Organization. (1993). Guidelines for drinking - water quality: Recommendations. World Health Organization.
Цитирование в стиле Чикаго (17-е изд.)World Health Organization. Guidelines for Drinking - Water Quality: Recommendations. Geneva: World Health Organization, 1993.
Цитирование MLA (8-е изд.)World Health Organization. Guidelines for Drinking - Water Quality: Recommendations. World Health Organization, 1993.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.