rozikin, M. ., E. . Daniati, and R. . Indriati. “Penerapan Customer Relationship Management Use Cross Selling Di Kelud Outdoor”. Prosiding SEMNAS INOTEK (Seminar Nasional Inovasi Teknologi), vol. 2, no. 1, Dec. 2020, pp. 065-8, doi:10.29407/inotek.v2i1.458.