บูรณะวนิชกุล เ. and อบรม โ. (2018) “NECESSARY VOCABULARY SIZE AND TWO BASIC STRATEGIES IN ENGLISH VOCABULARY LEARNING”, Sripatum Review of Humanities and Social Sciences, 17(2), pp. 119–128. available at: https://so05.tci-thaijo.org/index.php/spurhs/article/view/112210 (accessed: 13 October 2026).