“Harmonization of Regulatory Authority Between the Indonesian National Police and the National Narcotics Agency in the Use of Undercover Buy Techniques in Narcotics Crime Investigations”. SINGOSARI 3, no. 2 (July 21, 2026): 64–71. Accessed July 25, 2026. https://jurnal.sekawansiji.org/index.php/singosari/article/view/146.