Yavi AR, T. U., & Syamsuri, A. R. (2022). Employee Performance at PT. Pos Indonesia Persero Medan Barat Medan City: The Impact of Psychological Workload and Internal Work Environment. International Journal of Business, Technology and Organizational Behavior (IJBTOB), 2(3), 294–303. https://doi.org/10.52218/ijbtob.v2i3.202