khwunnak, chadarat. “Task Based Learning (TBL) Learning Activities With Demonstration and Role Play Seminar Course of Undergraduate Students: Task Based Learning (TBL): Demonstration:Role Play”. Journal of Innovative Technology Management Rajabhat Maha Sarakham University, Vol. 6, no. 1, June 2019, pp. 118-26, https://ph02.tci-thaijo.org/index.php/itm-journal/article/view/164479.