World Health Organization. Community Water Supply and Sanitation Unit. (1989). Pooling resources beyond borders: How seven small countries in Central America improved operation and maintenance of their water supply sectors by joining forces. World Health Organization.
Citazione stile Chigago Style (17a edizione)World Health Organization. Community Water Supply and Sanitation Unit. Pooling Resources Beyond Borders: How Seven Small Countries in Central America Improved Operation and Maintenance of Their Water Supply Sectors by Joining Forces. Geneva: World Health Organization, 1989.
Citatione MLA (9a ed.)World Health Organization. Community Water Supply and Sanitation Unit. Pooling Resources Beyond Borders: How Seven Small Countries in Central America Improved Operation and Maintenance of Their Water Supply Sectors by Joining Forces. World Health Organization, 1989.