Manurung, Freddy. “Bukan Lagi Korban: Edukasi Pembuli Di Perguruan Advent Lumban Gambiri”. AKM: Aksi Kepada Masyarakat 4, no. 2 (January 1, 2024): 465–472. Accessed August 27, 2026. https://ejournal.stebisigm.ac.id/index.php/AKM/article/view/981.