Tarigan, Simon, Abdul Rauf, Rahmawaty ., and R. Hamdani Harahap. “Model of Sustainable Belawan Harbor Waters Pollution Management Scheme”. Journal of Ecohumanism 3, no. 3 (July 5, 2024): 1208–1218. Accessed November 21, 2024. https://ecohumanism.co.uk/joe/ecohumanism/article/view/3432.