Darmawan, Didit, and Ayu Margareta. 2026. “Product Variety As a Basis for Differentiation and Its Managerial Implications in Wholesalin”. EKOMA : Jurnal Ekonomi, Manajemen, Akuntansi 5 (4):4129-46. https://doi.org/10.56799/ekoma.v5i4.16114.