Minister of Education and Culture Regulation number 51 of 2018 concerning the zoning system for student morality at SMA Negeri 2 Medan. Jurnal, Pendidikan [Internet]. 2023 Dec. 23 [cited 2026 Aug. 16];8(4):1575-81. Available from: https://ejournal.mandalanursa.org/index.php/JUPE/article/view/6387