Manik, R. and Soegesti, D.G. 2025. 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, 1 (Jul. 2025), 150–161. DOI:https://doi.org/10.52970/grmapb.v6i1.1324.