U. S. Environmental Protection Agency. Environmental Offices of Research and Development. (1979). Methods for chemical analysis of water and wastes. s.n.
Цитирование в стиле Чикаго (17-е изд.)U. S. Environmental Protection Agency. Environmental Offices of Research and Development. Methods for Chemical Analysis of Water and Wastes. Cincinnati, OH: s.n, 1979.
Цитирование MLA (9-е изд.)U. S. Environmental Protection Agency. Environmental Offices of Research and Development. Methods for Chemical Analysis of Water and Wastes. s.n, 1979.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.