Khoiri, Ummul, and Putri Wulandari. “CUSTOMER RELATIONSHIP MANAGEMENT IN THE DIGITAL AGE: A SYSTEMATIC REVIEW OF THE LITERATURE ”. Riau International Conference on Economics, Business and Accounting, vol. 1, no. 2, July, Realesed on Januari, Jan. 2024, pp. 447-56, https://riceba.prosiding.unri.ac.id/index.php/riceba-prosiding/article/view/105.