“Strengthening Batak Tribe Gratitude Worship Overseas as the Preservation of Batak Culture”. SERVIRE: Jurnal Penelitian dan Pengabdian 3, no. 2 (Mei 5, 2023): 75–89. Diakses Oktober 12, 2026. https://jurnal.widyaagape.ac.id/index.php/servire/article/view/142.