Safitri, B.; Nurhikmah, S.; Indriyani, P. D. Kontribusi Kegiatan Ekstrakurikuler Paduan Suara Terhadap Peningkatan Prestasi Akademik Di Tingkat Sekolah Menengah: The Contribution of Choir Extracurricular Activities to Improving Academic Achievement at the Secondary School Level. KPSBSL 2025, 2, 126-139.