Ratnawati F, Tedyyana A. PENINGKATAN SISTEM KEAMANAN DI LINGKUNGAN SMKN 1 BENGKALIS. BN [Internet]. 2023Dec.28 [cited 2025Apr.19];3(2):199 -204. Available from: https://ejournal.uniks.ac.id/index.php/bhakti_nagori/article/view/3241