Sumintarsih, Sumintarsih, et al. “Differences in Physical Fitness Level Students Studying Volleyball and Football Industrial Engineering Study Program UPN ‘Veteran’ Yogyakarta”. Jurnal Indonesia Sosial Sains, vol. 5, no. 05, June 2024, pp. 1255-62, doi:10.59141/jiss.v5i05.1127.