I. Nurmajid, K. Kusmiyati, D. I. Saefulah, A. G. Yulianto, and I. N. Haris, “Supporting Factors For Participation In Volleyball Extracurricular Training At Vocational Schools In The Gumelar Sub-District For The 2022/2023 Academic Year”, Indonesian J. Physical Activity, vol. 4, no. 2, pp. 174-181, Oct. 2024.