WIDARTI, Rini. PENERAPAN WILLIAM FLEXION EXERCISE PADA KASUS NYERI PUNGGUNG BAWAH (LOW BACK PAIN). GEMASSIKA: Jurnal Pengabdian Kepada Masyarakat, [S. l.], v. 2, n. 1, p. 28–31, 2018. DOI: 10.30787/gemassika.v2i1.252. Disponível em: https://journal.aiska-university.ac.id/index.php/gemassika/article/view/252. Acesso em: 3 jul. 2024.