1. Abd. Ghagar, M. N., Othman, R. & Mohammadpour, E. (2011). Multilevel analysis of achievement in mathematics of Malaysian and Singaporean students. Journal of Educational Psychology and Counseling, 2, 285–304.
2. Akyüz, G. & Berberoğlu, G. (2010). Teacher and classroom characteristics and their relations to mathematics achievement of the students in the TIMSS. New Horizons in Education, 58(1), 77–95.
3. Azzolini, D., Schnell, P. & Palmer, J. R. B. (2012). Educational achievement gaps between immigrant and native students in two “new” immigration countries: Italy and Spain in comparison. The ANNALS of the American Academy of Political and Social Science, 643(1), 46–77.
4. Bray, M. & Lee, W. O. (Eds.). (1997). Education and political transition. Hong Kong: Comparative Education Research Centre, HKU.
5. Coleman, J., Campbell, E., Hobson, C., McPartland, J., Mood, A. & Weinfeld, F. (1966). Equality of educational opportunity. Washington DC: U.S. Department of Health, Education and Welfare.