SARAGIH, M. G. .; GEA, I. .; MARBUN, R. .; ARITONANG, O. T. .; SITORUS, H. . Principal Leadership and Teacher Discipline with Teacher Professionalism at Public Middle Schools in Parlilitan District, Humbang Hasundutan Regency. Journal of Educational Analytics, [S. l.], v. 3, n. 2, p. 387–408, 2024. DOI: 10.55927/jeda.v3i2.8926. Disponível em: https://journal.formosapublisher.org/index.php/jeda/article/view/8926. Acesso em: 24 apr. 2026.