Jaroensawut, R. 2021. 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. 12, 2 (Aug. 2021), 115–130.