Simanjuntak, H. “The Effectiveness of Prison Criminal in Changing the Behavior of Inprison-Ers (Study at Class II B Penitentiary in Lubuk Pakam)”. International Journal of Multidisciplinary: Applied Business and Education Research, Vol. 4, no. 2, Feb. 2023, pp. 350-65, doi:10.11594/ijmaber.04.02.03.