Kuraesin E. PENGARUH KEGIATAN PROMOSI PRODUK VAS (VALUE ADDED SERVICE) UNGGULAN TERHADAP PENINGKATAN VOLUME PENJUALAN PT INDOSAT, TBK. INOVATOR [Internet]. 2016 Feb. 2 [cited 2024 Nov. 15];1(2). Available from: http://150.107.142.43/index.php/INOVATOR/article/view/170