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, vol. 4, no. 8, Aug. 2026, pp. 4239-50, https://ejournal.45mataram.ac.id/index.php/armada/article/view/3515.