Asmoni, A., Bafadal, I., Ulfatin, N., & Kusmintardjo, K. (2017). The policy of the ISO 9001 :2008 Quality Standard School. Journal of Social Sciences (COES&Amp;RJ-JSS), 6(3), 682–693. https://doi.org/10.25255/jss.2017.6.3.682.693