Saragih, Jopinus Ramli, Mhd Ramadhan, Anju Bherna D Nainggolan, and Novika Br Pandia. “The Influence of Promotion and Service Quality on Customers’ Decisions to Save at PT Bank Negara Indonesia, Balige Branch”. Economic: Journal Economic and Business 4, no. 4 (November 12, 2025): 829–837. Accessed November 13, 2025. https://jurnal.larisma.or.id/index.php/EJEB/article/view/1348.