Conant, Jeff (2005). Sanitation and Cleanliness for a Healthy Environment(PDF). Berkeley, California, USA: The Hesperian Foundation in collaboration with the United Nations Development Programme (UNDP), Sida. стр. 6. Архивирано из оригинала(PDF) 21. 10. 2014. г.
Conant, Jeff (2005). Sanitation and Cleanliness for a Healthy Environment(PDF). Berkeley, California, USA: The Hesperian Foundation in collaboration with the United Nations Development Programme (UNDP), Sida. стр. 6. Архивирано из оригинала(PDF) 21. 10. 2014. г.
who.int
„Diarrhoeal disease”. World Health Organization (на језику: енглески). Приступљено 17. 11. 2017.
„Sanitation”. Health topics. World Health Organization.