Asmoro, Anung, Lukito Edi Nugroho, and Selo . “Big Data Analytic As the Foundation of Customer Retention”. International Journal of Engineering & Technology 8, no. 1.9 (January 26, 2019): 578–580. Accessed May 3, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/26852.