Istiqomah, A. .; Arsila, F. .; Lubis, N. S. .; Hasibuan, R. J. .; Perangin Angin, L. M. The Implementation of Adiwiyata Program to Improve Character of Students Concern in Maintaining the School Environment at SD Negeri 101768 Tembung Academic Year 2022/2023. JEDA 2023, 2, 273-284.