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4. Ashley, L., Mcloughlin, C., Aslam, M., Engel, J., Wales, J., Rawal, S., Batley, R., Kingdon, G., Nicolai, S. & Rose, P. (2014). The role and impact of private schools in developing countries. University of Birmingham, Institute of Education University of London, Overseas Development Institute.
5. Aturupane, H. , 2009. The Pearl of Great Price: Achieving Equitable Access to Primary and Secondary Education and Enhancing Learning in Sri Lanka. CREATE no.29. Institute of Education, University of London.