Hendri Mayanta Tarigan, Andrian K Tarigan, and Jopinus Saragih. “The Influence of Promotion and Brand Image on the Purchase Decision of Samsung Handphone Goods at Universitas Efarina Pematang Siantar”. International Journal of Economics (IJEC) 1, no. 2 (December 30, 2022): 338–340. Accessed May 4, 2024. https://ejournal.ipinternasional.com/index.php/ijec/article/view/346.