อุดมลักษณ์ ส., บุญกล้า พ., and ไตรไพบูลย์ ด. “Effects of Problem-Based Learning on Learning Outcomes and Satisfaction Among Public Health Students in a Health Promotion and Elderly Care Course”. Journal of Nurses Association of Thailand Northern Office, vol. 25, no. 1, June 2019, pp. 80-90, https://he01.tci-thaijo.org/index.php/jnorthnurse/article/view/211819.