Wulandari, Rosanna, Arissetyanto Nugroho, and Derriawan Derriawan. “Supporting Factors of Digital Marketing and Customer Relationship Management and Their Role in Developing the Champion UMKM Model in West Java: Literature Review”. Quantitative Economics and Management Studies 6, no. 2 (April 30, 2025): 283-292. Accessed January 25, 2026. https://qemsjournal.org/index.php/qems/article/view/3951.