U. S. Environmental Protection Agency. Environmental Offices of Research and Development. (1979). Methods for chemical analysis of water and wastes. s.n.
Chicago-Zitierstil (17. Ausg.)U. S. Environmental Protection Agency. Environmental Offices of Research and Development. Methods for Chemical Analysis of Water and Wastes. Cincinnati, OH: s.n, 1979.
MLA-Zitierstil (9. Ausg.)U. S. Environmental Protection Agency. Environmental Offices of Research and Development. Methods for Chemical Analysis of Water and Wastes. s.n, 1979.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.