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PENGARUH SALES PROMOTION DAN PERSONAL SELLING TERHADAP CUSTOMER RETENTION PENGGUNA INDIHOME DI PT TELKOM KANTOR CABANG UJUNG BERUNG BANDUNG. j. sains manaj. [Internet]. 2022 Aug. 30 [cited 2025 Oct. 13];4(2):94-9. Available from: https://ejurnal.ars.ac.id/index.php/jsm/article/view/686