Nurul Sufni, Abdul Fattah Nasution, Khoirunnisa Fadila Rambe, Hafiz Yusuf Nasution, Faradillah Amelia. PEGARUH BUDAYA 5S (SENYUM, SAPA, SALAM, SANTUN, SOPAN) TERHADAP INTERAKSI SOSIAL SISWA KELAS XI MATRIKS SMA BUDISATRYA MEDAN. CES [Internet]. 2025 May 30 [cited 2026 Apr. 20];3(2). Available from: https://cemarajournal.com/journal/index.php/ces/article/view/148