สัตนาโค พระประกาสิต. 2018. “The Development of the Ability of English Vocabulary Learning of Pratomsuksa 2 Students by Using Role - Play Method and English Vocabulary Writing Exercises”. Academic Journal of Mahamakut Buddhist University Roi Et Campus 8 (1):148-55. https://so01.tci-thaijo.org/index.php/AJMBU/article/view/194941.