Bakar, R., Angreni, A., Kakiet, I., R, M. and Muhsin, M. (2025) “The Effectiveness of Gratitude Letter Writing Intervention on Increasing Subjective Well-Being in High School Students”, Journal of Correctional Issues, 8(1), pp. 215 - 229. doi: 10.52472/jci.v8i1.563.