Gowithayakorn, T., Phetkliang, F., Uthaiwat, J., Parakawong Na Ayutthaya, T. and Kitrungruang, D. 2023. Needs of Elementary Education Teachers for Upskill and Reskill for the Professional Development of Teachers in the VUCA World Era. KKU Research Journal (Graduate Studies) Humanities and Social Sciences. 10, 2 (Apr. 2023), 156–171.