Watanapokakul, S. (2012) “The effects of learning prefixes and roots to improve the ability to derive the meaning of unfamiliar words”, LEARN Journal: Language Education and Acquisition Research Network, 3, pp. 96–109. available at: https://so04.tci-thaijo.org/index.php/LEARN/article/view/102777 (accessed: 18 September 2026).