Antoni, A. ., H. . Royani Siregar, and J. . Andriani. “The Effectiveness of Progressive Muscle Relaxation on Physiological and Psychological Stress Control of Type 2 Diabetes Mellitus Clients in the Mandailing Batak Tribe”. KnE Social Sciences, vol. 8, no. 4, Mar. 2023, pp. 739–745, doi:10.18502/kss.v8i4.12968.