(2011). Guidelines for drinking-water quality (4th ed.). WHO.
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Citação norma Chicago
Guidelines for Drinking-water Quality. 4th ed. Geneva: WHO, 2011.
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Citação norma MLA
Guidelines for Drinking-water Quality. 4th ed. WHO, 2011.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.