American Public Health Association, A. W. W. A. (1999). Standard Methods for the Examination of Water and Wastewater. US.
Chicago-tyylinen lähdeviittausAmerican Public Health Association, American Water Works Association. Standard Methods for the Examination of Water and Wastewater. US, 1999.
MLA-viiteAmerican Public Health Association, American Water Works Association. Standard Methods for the Examination of Water and Wastewater. US, 1999.
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