Hasibuan, Surya. “Penerapan Metode Operational Competitiveness Rating Analysis (OCRA) Dalam Keputusan Rekomendasi Mutasi Jabatan Karyawan”. Bulletin of Data Science 1, no. 1 (September 16, 2021): 1-8. Accessed June 10, 2026. https://ejurnal.seminar-id.com/index.php/bulletinds/article/view/807.