Washington State Department of Health. Slow sand filtration and diatomaceous earth filtration for small water systems.
Цитирование в стиле Чикаго (17-е изд.)Washington State Department of Health. Slow Sand Filtration and Diatomaceous Earth Filtration for Small Water Systems.
Цитирование MLA (9-е изд.)Washington State Department of Health. Slow Sand Filtration and Diatomaceous Earth Filtration for Small Water Systems.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.