Suparman, A., R. N. Sasongko, and M. Kristiawan. “Implementation of School Problem Solving Management in Improving School Achievement”. JMKSP (Jurnal Manajemen, Kepemimpinan, Dan Supervisi Pendidikan), vol. 6, no. 2, May 2021, pp. 200-13, doi:10.31851/jmksp.v6i2.5570.