“The Role of Renewable Power Supply of Biogas Palm Oil Plant by PT. Ukindo in Accelerating Economic Growth and Regional Development in Kuala Sub-District, Langkat Regency”, Simbisa Journal of Social Sciences and Humanities, vol. 1, no. 1, pp. 9–17, Feb. 2021, Accessed: Oct. 28, 2026. Available: https://lmappi-journals.org/simsos/article/view/10