WIJAYA, H. H. EFEKTIVITAS PENGUNAAN COUNTER DOWN SEBAGAI MEDIA HITUNG SENAM BAGI PENYANDANG TUNA RUNGU SLB SANTI MULIA SURABAYA. Jurnal Speed (Sport, Physical Education, Empowerment), [S. l.], v. 1, n. 1, p. 40–44, 2018. DOI: 10.35706/speed.v1i1.1435. Disponível em: https://journal.unsika.ac.id/index.php/speed/article/view/1435. Acesso em: 14 may. 2024.