(1994). Operation and Maintenance of Urban Water Supply and Sanitation Systems A guide for Managers. World Health Organization.
Chicagoスタイル(17版)引用形式Operation and Maintenance of Urban Water Supply and Sanitation Systems A Guide for Managers. Ginebra: World Health Organization, 1994.
MLA(9版)引用形式Operation and Maintenance of Urban Water Supply and Sanitation Systems A Guide for Managers. World Health Organization, 1994.
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