Susilowati, Retno, et al. “INSTRUCTIONAL LEADERSHIP OF THE PRINCIPAL IN THE TRANSFORMATION OF VISION AND MANAGEMENT OF ACHIEVEMENT-BASED LEARNING: A CASE STUDY OF SDN 1 BUGEL”. SOSIOEDUKASI : JURNAL ILMIAH ILMU PENDIDIKAN DAN SOSIAL, vol. 15, no. 2, Apr. 2026, pp. 240-5, doi:10.36526/sosioedukasi.v15i2.7745.