Sembiring, Piter, et al. “Band Milestones As Strategy for Mapping Students’ Musical Progress in GJKI Bandung Raya”. Virtuoso: Jurnal Pengkajian Dan Penciptaan Musik, vol. 8, no. 2, Jan. 2026, pp. 137-53, doi:10.26740/vt.v8n2.p137-153.