Thongtaweewattana N. Development Guidelines on Speaking Skills and the Art of Speaking in Public of Students at Assumption University. J.Humanities Social Sciences [internet]. 2022 Aug. 17 [cited 2026 Sep. 30];5(3):912-29. available from: https://so04.tci-thaijo.org/index.php/jmhs1_s/article/view/257764