Imron, A. (2017). Empirical model pupil management integrating with balancing competitive-solidarity value for the preparation of character generation competitive and social- solidarity to be ready demographic bonus and the best economic era. Journal of Social Sciences (COES&Amp;RJ-JSS), 6(1), 1–13. https://doi.org/10.25255/jss.2017.6.1.1.13