Herman, Sujanto, B. and Suryadi (2020) “Evaluation of implementation of Adiwiyata SMPN Program Tanjungpinang City Riau Islands Province”, Technium Social Sciences Journal. Constanta, Romania, 13(1), pp. 51–61. Available at: https://www.techniumscience.com.techniumscience.pluscommunication.eu/index.php/socialsciences/article/view/1959 (Accessed: 19 April 2026).