Nisa Hafiza et al. 2024. Analysis of the Influence of Leadership Style, Job Satisfaction, and Work Environment on Employee Performance in PT Kereta Api Indonesia (Persero) Regional Division I North Sumatra. Formosa Journal of Social Sciences (FJSS). 3, 2 (Aug. 2024), 503–520. DOI:https://doi.org/10.55927/fjss.v3i2.10856.