A. Potter, Klutse, A., Snehalatha, M., Batchelor, C., Uandela, A., Naafs, A., Fonseca, C., e Moriarty, P. B.,
«Assessing sanitation service levels»,
WASHCost global working papers, vol 3. IRC, The Hague, The Netherlands, p 27 p. : 16 fig., 2011.
C. Fonseca, Franceys, R., Batchelor, C., McIntyre, P., Klutse, A., Komives, K., Moriarty, P. B., Naafs, A., Nyarko, K., Pezon, C., Potter, A., Reddy, R., e Snehalatha, M.,
«Life-cycle costs approach : costing sustainable services», vol 1a. IRC, The Hague, the Netherlands, p 37 p. : 7 tab.; 6 fig., 2011.