Browsing by Author Simatupang, Welly Saputra
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| Issue Date | Title | Author(s) |
|---|---|---|
| 2013 | Peranan Customer Service dalam Meningkatkan Pelayanan Informasi dan Penanganan Keluhan Pelanggan (Di Call Center Telkomsel Medan) | Simatupang, Welly Saputra |