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Analisis penanganan bullying melalui program 5S ( senyum, sapa, salam sopan, santun) di SD Muhammadiyah Pakel Program Plus. PJPD [Internet]. 2024 Dec. 31 [cited 2025 Apr. 3];4(3):149-58. Available from: https://jurnal.educ3.org/index.php/pendagogia/article/view/123