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 (Jun. 2024), 387–408. DOI:https://doi.org/10.55927/jeda.v3i2.8926.