Fahria, Vita Minkhatul, et al. “The Effect of Discounts, Free Shipping, and Product Quality on Lifebouy Soap Purchase Decisions in Semarang City Trough E-Commerce Shopee”. Asian Bulletin of Digital Economics and Business, vol. 1, no. 1, June 2025, pp. 35-41, https://www.journal.uruborospublishing.com/index.php/abdeb/article/view/59.