ปรุงเกียรติ ธ. and ไชยสุข อ. (2017) “The Use of Genre-based Activities to Develop Students’ Complaint Letter Writing Ability”, Journal of Roi Et Rajabhat University, 11(2), pp. 272–281. Available at: https://so03.tci-thaijo.org/index.php/reru/article/view/176375 (Accessed: 4 May 2024).