Tyas, M. A., J. Nurkamto, and S. Marmanto. “CULTIVATING STUDENTS’ HIGHER-ORDER THINKING SKILLS IN EFL CLASSES: THE ROLE OF THE TEACHER AND THE TEXTBOOK”. International Online Journal of Education and Teaching, vol. 7, no. 1, Jan. 2020, pp. 267-76, https://iojet.org/index.php/IOJET/article/view/773.