Jaroensawut, R. “The Exploration of English Vocabulary Learning Used by the First-Year Undergraduate Students of Rajamangala University of Technology Tawan – Ok: Chakrabongse Bhuvanarth Campus: The Exploration of English Vocabulary Learning Used by the First-Year Undergraduate Students of Rajamangala University of Technology Tawan – Ok: Chakrabongse Bhuvanarth Campus”. Faculty of Humanities and Social Sciences Thepsatri Rajabhat University Jounal, vol. 12, no. 2, Aug. 2021, pp. 115-30, https://so01.tci-thaijo.org/index.php/truhusocjo/article/view/243822.