1. Bhattacherjee,A.(2012).Social Science Research: Principles, Methods, and Practices, 2nd edition, Creative Commons Attribution,Florida.;
2. Jacobs, J., Nagan, W., Zucconi, A. (2014). Unification in the Social Sciences: Search for a Science of Society. Cadmus, Vol. 2, No. 3, October 2014, pp. 1-22.;
3. Streeck,W. (2010). Social sciences: Between theory and intuition, MaxPlanckResearch 4/10.;
4. Duhs, L.A. (2006). Is economic philosophy a subject worth teaching? Australasian Journal of Economics Education. Vol. 3, No. 1 & 2, 2006.;
5. Varian, H. (1989). Handbook of Industrial Organization. Vol. 1, 1989, pp. 597-654.;