Fitri Marisa, Sarifah Shakinah Syed Ahmad, Zeratul Izzah Mohd Yusof, Fachrudin Hunaini, and Tubagus Mohammad Akhriza Aziz. “Segmentation Model of Customer Lifetime Value in Small and Medium Enterprise (SMEs) Using K-Means Clustering and LRFM Model”. International Journal of Integrated Engineering 11, no. 3 (September 3, 2019). Accessed August 7, 2026. https://journal.uthm.edu.my/index.php/ijie/article/view/4661.