Somboonboorana S. The Integrated Learning Process of Problem-based Learning and Contemplative Study in the Course of Humanity Life and Self Development. WJLI [internet]. 2017 Aug. 11 [cited 2026 Sep. 12];1(2):39-5. available from: https://so03.tci-thaijo.org/index.php/jliwu/article/view/95057