1. F. Ennis, Infrastructure provision and the urban environment, in Ennis, F. (2003). Infrastructure Provision and Negotiating Process, London, Ashgate. (2003).
2. D. Salleh, Developing Infrastructure Procurement Framework Using Planning Gain Approach for Local Authority in Peninsular Malaysia. Universiti Utara Malaysia. (2011).
3. O. Okinono, D. Salleh and B. Din, Infrastructure and Human Development in Nigeria: A Study of the South-South Geo-Political Zone. IOSR Journal of Humanities and Social Science (IOSR-JHSS) (2015), pp. 65–73.
4. R.W. Vickerman, Transport and Economic Development, Report for 119th Round Table, European Conference of Ministers of Transport, Paris, March. 2001a.
5. D. Grimsey and M. K Lewis, Evaluating the risks of public private partnerships for infrastructure projects. International Journal of Project Management, (2002), pp. 107–118.