Sir Charles Eliot, K.C.M.G., The East Africa Protectorate, London: Edward Arnold, 1905, digitized by the Internet Archive in 2008 (PDF format).
archive.today
by Gwillim Law (18 Ιανουαρίου 2013). «Origins of names». archive.is. Αρχειοθετήθηκε από το πρωτότυπο στις 18 Ιουνίου 2013. Ανακτήθηκε στις 12 Μαΐου 2016.CS1 maint: Unfit url (link)
Tripp, Aili Mari. Changing the Rules: The Politics of Liberalization and the Urban Informal Economy in Tanzania. (στα Αγγλικά) Berkeley, Calif London: University of California Press, c1997 1997. ISBN:0520202783
[1]"Around 1983, as the transport problem began to reach crisis proportions, informal buses called daladala or thumni came into greater use." (σελ. 161)