S. Burhan, K. A. Erika, and S. Said, “EFEKTIFITAS RELAKSASI OTOT PROGRESIF DALAM MENURUNKAN KECEMASAN: TINJAUAN LITERATUR: The Effectiveness of Progressive Muscle Relaxation in Reducing Anxiety: A Literature Review”, Jikep, vol. 8, no. 1, pp. 33-40, Feb. 2022.