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“Upaya Satbinmas Polres Purworejo Dalam Mencegah Penyalahgunaan Narkoba Di Kalangan Pelajar”. Advances in Police Science Research Journal 1, no. 4 (April 30, 2017): 1211–1260. Accessed August 25, 2026. https://journal.akpol.ac.id/index.php/apsrj/article/view/99.