Jopinus Saragih, Mhd. Ramadhan, Nurmasdalifah Nurmasdalifah, and Jumadiah Wardati. “The Influence of Digital Marketing and Service Quality on Consumer Purchase Decisions at PT. Roti Ketawa Siantar Waka-Waka”. International Journal of Economics, Commerce, and Management 3, no. 3 (July 20, 2026): 37–46. Accessed September 30, 2026. https://international.areai.or.id/index.php/IJECM/article/view/1267.