“The Transformation of PT Kereta Api Indonesia (KAI): Improve in Service, Human Resource, and Recruitment Systems from Past to Present: Transformasi PT. Kereta  Api  Indonesia (KAI) Peningkatan Layanan, SDM, dan Sistem Rekrutmen dari Dulu hingga Sekarang”, pssh, vol. 9, no. 1, pp. 619–624, Aug. 2026, doi: 10.21070/pfx9e373.