Dea Aprillia Simamora, Barham Siregar, Nurul Dalimunte. Employee Training Efforts and Incentive Provision Towards Improving Employee Performance Through Customer Service at Kembar Ponsel Medan. JD [Internet]. 2025 Dec. 18 [cited 2026 Apr. 16];23(3):309-26. Available from: https://jurnaldialektika.com/index.php/piani/article/view/839