Adlan, Muhammad Kafin. “Optimization of the Intelligence Gathering Performance of Unit 4 Intelligence and Security Unit Sragen Resort Police to Countermeasures Radicalism”. Indonesian Journal of Police Studies 6, no. 9 (October 17, 2024). Accessed July 26, 2025. https://journal.akpol.ac.id/index.php/ijps/article/view/976.