Sugijantoro, A. C., R. Anggraini, and R. K. . Afiyah. “The Effect of Combination Of Progressive Muscle Relaxation And Nature Sound Music Therapy On Sleep Quality Of Menopaused Women”. Journal of Applied Nursing and Health, vol. 4, no. 2, Dec. 2022, pp. 340-8, doi:10.55018/janh.v4i2.107.