Yusuf, M.; A. Siregar, W.; Khayati, S.; Hardiansyah B., L. M. I.; Umar, A.; Riyanto, S. Synergy of Collaboration Between BNN and Polri in the Process of Investigating Narcotics Crimes (A Study of the Police and BNN of Southeast Sulawesi Province ). IJMEHD 2023, 3, 1026-1036.