Agit Bagus Hartadi, Bagus Susetyo. The Management of Extracurricular Marching Band Instruction: A Case Study of the Gema Dirgantara Marching Band at SMP Negeri 3 Kroya. JURAGAN. 2026;3(1 (Spesial Issue):833-844. doi:10.62710/5e8phq87