Harahap, J. B., & Tika Indria. (2026). The relationship between communication skills and organizational culture and employe work effectiveness: a case study of UPT Balai Yasa Pulubrayan PT. Kereta Api Indonesia (Persero). International Journal of Enterprise Modelling, 20(1), 72–80. https://doi.org/10.35335/int.jo.emod.v20i1.167