W. Warju, T. Köhler, S. Ariyanto, and K. Komarudin, “Evaluating Green Behavior Index in Vocational Education for Sustainable Campus Development”, jtet, vol. 18, no. 1, pp. 269–279, Jun. 2026, Accessed: Aug. 12, 2026. [Online]. Available: https://journal.uthm.edu.my/index.php/JTET/article/view/24998