Sihombing, A.T.M. , Sitorus, R. and Sembiring , H.N. 2024. Implementation of Corporate Social Responsibility (CSR) Study at PT Kereta Api Indonesia (Persero) Regional Division I North Sumatera. Indonesian Journal of Interdisciplinary Research in Science and Technology. 2, 7 (Jul. 2024), 1159–1178. DOI:https://doi.org/10.55927/marcopolo.v2i7.10619.