Chaiyasit, Wilaiporn, Komkrit Chomsuwan, and Sumalee Chanchalor. “Hybrid Teaching Using Problem-Based Learning to Promote Self-Directed Learning Abilities of Students During the COVID-19 Pandemic”. International Journal of Learning, Teaching and Educational Research 22, no. 8 (August 30, 2023): 1–22. Accessed April 29, 2026. http://ijlter.myres.net/index.php/ijlter/article/view/1704.