Nasution, R., and R. Iriani. “Effect Of Progressive Relaxation Techniques And Combination Of Relaxation Glucose Levels In Type 2 Diabetes Mellitus Patient In RSIJ Pondok Kopi”. Jurnal Persada Husada Indonesia, Vol. 1, no. 1, Jan. 2014, pp. 47-54, https://jurnal.stikesphi.ac.id/index.php/Kesehatan/article/view/36.