1. BlueNext. (2010, This page was accessed on December 2010 28). Retrieved from http://www.bluenext.fr/publications/tendances.html.
2. Bovy, P., Bliemer, M., & Van Nes, R. (2006). Transportattion Modelling. Delft: University of Delft.
3. DROMAS. (2009). Traffic count report. Zanzibar.
4. Folton, L. (2001). Sustainable transport: New insights from the IEA's worldwide transit study. Paris.
5. Heertje, A., & Polak, J. (2001). Analytical Transport Economics: An International prespective. United Kingdom, United Kingdom: Edward Elgar publishing limited.