C. B. Olayiwole, Ezirim, y Okoro, G. C.,
«Children as agents of sanitation and hygiene behaviour change», in
Towards the millennium development goals - actions for water and environmental sanitation : proceedings of the 29th WEDC conference, Abuja, Nigeria, 2003, Loughborough, UK, 2003, pp. P. 55-57 : 2 fig., 1 tab.