Manik, Rionaldo, and Dwi Gema Soegesti. “The Influence of Social Media Promotion and Electronic Payment Systems on Purchase Decisions: Case Study from Users of Shopee in Bandar Lampung, Indonesia”. Golden Ratio of Marketing and Applied Psychology of Business 6, no. 1 (July 30, 2025): 150–161. Accessed April 15, 2026. https://goldenratio.id/index.php/grmapb/article/view/1324.