Julianto, A.M., Matanari, A.F. and Karepesian, S.Y.R. 2024. A Optimization of Direction Finder in Disclosing Cases of Threatening By Jatanras Unit, Criminal Research Unit, Surabaya City Police Office. Tanggon Kosala. 13, 1 (Apr. 2024), 20-31. DOI:https://doi.org/10.70526/tk.v13i1.1491.