Dea Aprillia Simamora, Barham Siregar and Nurul Dalimunte (2025) “Employee Training Efforts and Incentive Provision Towards Improving Employee Performance Through Customer Service at Kembar Ponsel Medan”, Jurnal Dialektika: Jurnal Ilmu Sosial, 23(3), pp. 309–326. doi: 10.63309/dialektika.v23i3.839.