1. Ecoforum, 2001. Lake Victoria: Economic Lifeline, Regional Toilet. (Water hyacinth prob), vol. 25, No. 2, Cold Season.
2. Esho, L.S, 1997. An assessment of the role of the private sector in urban infrastructure service provision: a case of solid waste management in the City of Nairobi. Thesis submitted in partial fulfillment for the degree of Master of Arts (Planning), University of Nairobi.
3. Gathuru, P.K., 1994. Affordable water supply and sanitation: Nairobi. Waste recycling in Nairobi slums. In: 20th WEDC Conference Colombo, Sri Lanka.
4. Population and Housing Census Volume I;Government of Kenya, 2001,1999
5. Government of Kenya, 2002. Economic Survey Government Printers, Nairobi.