N. . Thanachitditsaya, S. . Na Nongkhai, and P. . . Laimanoo, “Utilization of Research Oral Presentation to Reinforce Undergraduate Students’ the 21st Century Skills as Active Learning”, Mahachulalongkornrajavidyalaya University, vol. 4, no. 2, pp. 16–30, Aug. 2023.