Nainggolan, Agustina, Aprinawati Aprinawati, Enjelia Manik, Mulyati Patresia Sinaga, and Siat Putri Kabeakan. 2025. “Sales Team Performance Improvement Strategy in Increasing Sales Volume: Case Study at Medan Yamaha Center”. Economic: Journal Economic and Business 4 (1):37-41. https://doi.org/10.56495/ejeb.v4i1.857.