Saragih, M. G. ., Gea, I. ., Marbun, R. ., Aritonang, O. T. ., & 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), 387–408. https://doi.org/10.55927/jeda.v3i2.8926