nursusilo, woro. “SKILL LEVEL OF UNDERWEAR VOLLEYBALL SERVICE OF EXTRACURRICULAR STUDENTS OF STATE SENIOR HIGH SCHOOL 1 SINDANG”. International Journal of Sport, Physical Education and Recreation 1, no. 02 (November 28, 2025): 49–58. Diakses Juli 8, 2026. https://journal-fkip.unsika.ac.id/index.php/ijsper/article/view/12300.