J. Butterworth, Welle, K., Bostoen, K., Chaka, T., y Goshu, A.,
«Monitoring WASH in Ethiopia : messages from a sector symposium : RiPPLE symposium report». RiPPLE, Research-inspired Policy and Practice Learning in Ethiopia and the Nile region, Addis Ababa, Ethiopia, p. 4 p., 2010.