Dioputra, M.R. and Siregar, H. 2026. The Role of Gamification Mechanisms in CRM Systems in Enhancing Customer Loyalty: A Systematic Literature Review. Jurnal Indonesia Sosial Sains. 7, 3 (Mar. 2026), 759–771. DOI:https://doi.org/10.59141/jiss.v7i3.2254.