Wijayanti R, Prayitno HJ, Sumardjoko B. Progressive leadership in strengthening teacher professionalism at SMK Muhammadiyah 1 Baturetno. EJR [Internet]. 2026Mar.1 [cited 2026Mar.2];5(2):135-41. Available from: https://jurnal.larisma.or.id/index.php/EJR/article/view/1445