Aprillia, R. E., R. K. Maala, Assa’adahS., and N. Asyraf. “Criminological Analysis of Narcotics Addicts in the Study of Differential Association and Sub Culture Theory”. Law Research Review Quarterly, Vol. 6, no. 3, Aug. 2020, pp. 207-14, doi:10.15294/lrrq.v6i3.31211.