Hasmar, W., F. Faridah, and P. . Hadi. “PERBEDAAN PENGARUH CORE STABILITY EXERCISE DAN WILLIAM FLEXION EXERCISE TERHADAP LOW BACK PAIN MYOGENIK : DIFFERENCES IN THE EFFECT OF CORE STABILITY EXERCISE AND WILLIAM FLEXION EXERCISE ON MYOGENIC LOW BACK PAIN”. Quality : Jurnal Kesehatan, vol. 17, no. 1, May 2023, pp. 64-71, doi:10.36082/qjk.v17i1.908.