Muhammad Donni, Ladipin and Afrizal (2025) “A COMPREHENSIVE SURVEY ON THE PROFICIENCY OF UNDERHAND SERVING SKILLS AMONG EIGHTH-GRADE FEMALE STUDENTS IN THE VOLLEYBALL EXTRACURRICULAR PROGRAM AT SMP NEGERI 6 LAWE SIGALA-GALA ”, International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET), 4(7), pp. 4019–4025. doi: 10.54443/ijset.v4i7.1281.