Antoni, A., Royani Siregar, H., & Andriani, J. (2023). 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, 8(4), 739–745. https://doi.org/10.18502/kss.v8i4.12968