Rahayu, D., A. A. . Suryanto, A. . Nurlifa, A. . Muqtadir, and Miftahurrohman. “Implementasi Customer Relationship Management (CRM) Di Toko Handphone Rejo Cell Tuban”. STAINS (SEMINAR NASIONAL TEKNOLOGI &Amp; SAINS), vol. 1, no. 1, Feb. 2022, pp. 161-6, https://proceeding.unpkediri.ac.id/index.php/stains/article/view/1518.