Ruiz-Mier et Van Ginneken, « ConsumerCooperatives: An Alternative Institutional Model for Delivery of Urban Water Supply and Sanitation Services », Note no 5 de la Banque mondiale, janvier 2006.
Ruiz-Mier and Van Ginneken, “Consumer Cooperatives: An Alternative Institutional Model for Delivery of Urban Water Supply and Sanitation Services، مذكرة البنك الدولي رقم 5، كانون الثاني/يناير 2006.