Salih, M. “Teachers’ Perceptions and students’ Motivation to Thinking-Based Learning (TBL) in a Classroom Context”. Journal of Research, Policy & Practice of Teachers and Teacher Education, vol. 4, no. 2, Sept. 2018, pp. 5-14, https://ejournal.upsi.edu.my/index.php/JRPPTTE/article/view/182.