Istiantara, Dedik Tri. “Development of Competency-Based Human Resource Management to Improve the Performance of Indonesian Railways Polytechnic Staff and Lecturers”. Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal) 3, no. 2 (December 4, 2019). Accessed June 15, 2026. https://jurnal.ppi.ac.id/jpi/article/view/89.