เชื้อวังคา วรัญญา, and ภูษาวิโศธน์ พิลานุช. “Using Genre-based Teaching Activities to Develop Application letter Writing Abilities for High Vocational Certificate Students”. Journal of Roi Et Rajabhat University 11, no. 2 (December 31, 2017): 282–292. accessed March 13, 2025. https://so03.tci-thaijo.org/index.php/reru/article/view/176376.