E. Appiah-Effah, Nyarko, K. B., Oduro-Kwarteng, S., y Moriarty, P. B.,
«Quantifying the cost of community water supply services : case of Bosomtwe-Atwima-Kwanwoma District (BAKD), Ghana». IRC, Delft, The Netherlands, p. 12 p. : 4 fig., 3 tab., 2009.