Principal Leadership as a Driver of Early Childhood Teacher Competency: A Systematic Literature Review. JED (Jurnal Etika Demokrasi), [S. l.], v. 11, n. 2, 2026. DOI: 10.26618/zbmjpp49. Disponível em: https://journal.unismuh.ac.id/index.php/jed/article/view/21638. Acesso em: 30 jun. 2026.