Ahmed Robulla Sakti, and Jerry Heikal. “Integrasi RFM Dan Etnografi Dalam Segmentasi Buyer B2B PT Kaltim Prima Coal: Identifikasi Churn Risk Dan Pengembangan Online Value Proposition”. ARMADA : Jurnal Penelitian Multidisiplin 4, no. 8 (August 31, 2026): 4239–4250. Accessed September 10, 2026. https://ejournal.45mataram.ac.id/index.php/armada/article/view/3515.