ผ่องอักษร ป. Learning in The 21st Century : Lesson Learned from Flipped Classroom. J Royal Thai Army Nurses [internet]. 2018 Aug. 29 [cited 2026 Sep. 30];19(2):47-54. available from: https://he01.tci-thaijo.org/index.php/JRTAN/article/view/143925