Warju, Warju, Thomas Köhler, Sudirman Ariyanto, and Komarudin Komarudin. 2026. “Evaluating Green Behavior Index in Vocational Education for Sustainable Campus Development”. Journal of Technical Education and Training 18 (1): 269-79. https://publisher.uthm.edu.my/ojs/index.php/JTET/article/view/24998.