Παραπομπή APA

(1980). World Bank research in water supply and sanitation: Summary of selected publications. Washington: World Bank.

Παραπομπή Chicago Style

World Bank Research in Water Supply and Sanitation: Summary of Selected Publications. Washington: World Bank, 1980.

Παραπομπή MLA

World Bank Research in Water Supply and Sanitation: Summary of Selected Publications. Washington: World Bank, 1980.

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