MACHFUD, A.; DWICAHYO, F.; WAHYONO, M. Pengetahuan Mahasiswa Fakultas Ilmu Keolahragaan Universitas Negeri Surabaya Tentang Alat Olahraga Gym Ball. JSES : Journal of Sport and Exercise Science, [S. l.], v. 1, n. 1, p. 01–07, 2018. DOI: 10.26740/jses.v1n1.p01-07. Disponível em: https://journal.unesa.ac.id/index.php/jses/article/view/2419. Acesso em: 1 mar. 2024.