Ofrita L, Kartikowati S, Sumarno S. The Effect of Principal Leadership and Teacher Work Spirit on Teacher Discipline in Elementary Schools in Cluster XII, Dumai Timur District. JES [Internet]. 2026 Jan. 21 [cited 2026 May 20];6(1):116-29. Available from: https://jes.ejournal.unri.ac.id/index.php/JES/article/view/1883