Boonpleng, W., A. Thiengtrongdee, A. Norapoompipa, S. Nammuang, N. Lumrod, and A. Hoikum. “Effects of Problem-Based Learning on Course Achievement Among Baccalaureate Nursing Students”. Nursing Science Journal of Thailand, vol. 36, no. 4, Dec. 2018, pp. 28-38, https://he02.tci-thaijo.org/index.php/ns/article/view/176890.