Sihombing ATM, Sitorus R, Sembiring HN. Implementation of Corporate Social Responsibility (CSR) Study at PT Kereta Api Indonesia (Persero) Regional Division I North Sumatera. MARCOPOLO [Internet]. 2024 Jul. 30 [cited 2026 May 7];2(7):1159-78. Available from: https://journal.formosapublisher.org/index.php/marcopolo/article/view/10619