Dinihari, Pancayani, Effendy Effendy, Sri Rahayu, and I Wayan Dasna. “Evaluation of Learning Cycle 4E-RE to Improve Chemistry Learning of Vocational High School Student”. Journal of Technical Education and Training 13, no. 2 (March 10, 2021): 108–114. Accessed July 4, 2022. https://publisher.uthm.edu.my/ojs/index.php/JTET/article/view/7518.