Aini Nabilah Marzuq, et al. “The Effects of Product Variety and Price Perception on Purchase Decisions: Evidence from ROSCA Tumbler Consumers on the Shopee Marketplace”. International Journal of Economics, Commerce, and Management, vol. 3, no. 1, Jan. 2026, pp. 84-97, doi:10.62951/ijecm.v3i1.1117.