Kaliappan, Anusuya, and Hashima Hamid. “Green Technology: A Must or a Need in TVET Education in Malaysia?”. Journal of Technical Education and Training, vol. 13, no. 1, Jan. 2021, pp. 86-96, https://penerbit.uthm.edu.my/ojs/index.php/JTET/article/view/7891.