Simanjuntak, H. 2023. 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. 4, 2 (Feb. 2023), 350-365. DOI:https://doi.org/10.11594/ijmaber.04.02.03.