Susanto, Saskia, Rini Indahwati. The Influence of Promotional Mix on Decision Making to Purchase Oppo Brand Cell Phones in Medan City. OJES [Internet]. 2022 Sep. 29 [cited 2025 Sep. 14];1(2):77-89. Available from: https://journal.outlinepublisher.com/index.php/OJES/article/view/25