Chaiyasit W, Chomsuwan K, Chanchalor S. Hybrid Teaching Using Problem-Based Learning to Promote Self-Directed Learning Abilities of Students during the COVID-19 Pandemic. IJLTER [Internet]. 2023 Aug. 30 [cited 2026 Sep. 10];22(8):1-22. Available from: https://www.ijlter.net/index.php/ijlter/article/view/1704