Bustam IG. EDUKASI TEKNIK KNEE TO CHEST EXERCISE UNTUK MENGATASI NYERI PUNGGUNG BAWAH. khidmah [Internet]. 2022Oct.13 [cited 2025Nov.7];4(2):576-82. Available from: https://khidmah.ikestmp.ac.id/index.php/khidmah/article/view/410