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