Silalahi, M., Nasution, H. A. R., & Fikri, R. (2025). Implementation of The Police Professional Code of Ethics In Handling Violations of Member Discipline In Propam Polresta Deli Serdang. Jurnal ISO: Jurnal Ilmu Sosial, Politik Dan Humaniora, 5(1), 8. https://doi.org/10.53697/iso.v5i1.2502