New York State Departament of Health. Manual of Instruction for Water Treatment plant Operators. Health Education Service.
Cita Chicago Style (17a ed.)New York State Departament of Health. Manual of Instruction for Water Treatment Plant Operators. New York: Health Education Service.
Cita MLA (9a ed.)New York State Departament of Health. Manual of Instruction for Water Treatment Plant Operators. Health Education Service.
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