J. Verhoeven, Uytewaal, E., De la Harpe, J., y IRC International Water and Sanitation Centre, The Hague, NL,
«Aid effectiveness in the water and sanitation sector : policies, practices and perspectives», vol. 26. IRC, The Hague, The Netherlands, p. 83 p.; 6 fig.; 2 boxes, 2011.
S. Smits, Dietvorst, C., Verhoeven, J., y Butterworth, J.,
«Scanning the 2020 horizon : an analysis of trends and scenarios in the water, sanitation and hygiene sector», vol. no. 45. IRC, The Hague, The Netherlands, p. 72 p. : 13 fig., 15 tab., 2011.