Saragih, M. G. ., Gea, I. ., Marbun, R. ., Aritonang, O. T. . and Sitorus, H. . (2024) “Principal Leadership and Teacher Discipline with Teacher Professionalism at Public Middle Schools in Parlilitan District, Humbang Hasundutan Regency”, Journal of Educational Analytics, 3(2), pp. 387–408. doi: 10.55927/jeda.v3i2.8926.