Sunardi, Gianto, and Jerry Heikal. 2026. “B2B Segmentation of Coal Buyers Using RFM Analysis and Ethnography at PT XYZ”. JIBEMA: Jurnal Ilmu Bisnis, Ekonomi, Manajemen, Dan Akuntansi 4 (1):3177-95. https://doi.org/10.62421/jibema.v4i1.764.