“Peran Unit Dikyasa Satuan Lalu Lintas Polres Purworejo Dalam Menekan Angka Kecelakaan Lalu Lintas: The Role of Dikyasa Traffic Unit Police of Purworejo Regional Police in Suppressing Traffic Accident Rates”.
Advances in Police Science Research Journal, vol. 1, no. 1, Jan. 2017, pp. 195-44,
https://doi.org/10.70526/apsrj.v1i1.22.