A Optimization of Direction Finder in Disclosing Cases of Threatening By Jatanras Unit, Criminal Research Unit, Surabaya City Police Office. TANGGON [Internet]. 30 April 2024 [dikutip 15 Oktober 2026];13(1):20-31. Tersedia pada: https://journal.akpol.ac.id/index.php/tanggonkosala/article/view/1491