NASA, Herlina; LESTARI, Slamet. The Role of School Principals’ Leadership in Improving Teacher Performance at Proskill Health Vocational School Tualang and YPPI Vocational School Tualang, Siak Regency. Journal of Educational Sciences, [S. l.], v. 9, n. 6, p. 6547–6558, 2025. DOI: 10.31258/jes.9.6.p.6547-6558. Disponível em: https://jes.ejournal.unri.ac.id/index.php/JES/article/view/1565. Acesso em: 8 oct. 2026.