Chinchua S, Kantathanawat T, Tuntiwongwanich S. Increasing Programming Self-Efficacy (PSE) Through a Problem-Based Gamification Digital Learning Ecosystem (DLE) Model. JHETP [Internet]. 2022 Aug. 22 [cited 2024 Nov. 23];22(9). Available from: https://mail.articlegateway.com/index.php/JHETP/article/view/5370