USAID -Washington, DC, US y Horsley and Witten -Sandwich, MA, US,
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Australian Agency for International Development -Canberra, ACT, AU, AusAid y Water and Sanitation Program -Washington, DC, US, WSP,
«Urban sewerage and sanitation : 30 years of experience and lessons». Water and Sanitation Program, WSP, Washington, DC, USA, p. v, 59 p. : 5 fig., 8 tab.
K. Charles, Pond, K., Pedley, S., Hossain, R., y Jacot-Guillarmod, F.,
«Vision 2030 : the resilience of water supply and sanitation in the face of climate change : technology projection study». University of Surrey, Robens Institute, Guildford, UK, p. 109 p. : 21 fig., 24 tab.