Pitaksongkram, P. ., and L. . Jamjan. “The Pedagogical Program Development Fostering Creative Thinking Skill in Independent Study Subject”. Nursing Journal of The Ministry of Public Health, vol. 30, no. 1, Aug. 2020, pp. 203-16, https://he02.tci-thaijo.org/index.php/tnaph/article/view/244952.