เอมดิษฐ ชุติชล. “INDIRECT SPEECH ACTS OF STANDARD THAI SPEAKERS WITH DIFFERENT SOCIAL STATUSES”. Sripatum Review of Humanities and Social Sciences 14, no. 2 (March 21, 2018): 64–71. accessed August 29, 2026. https://so05.tci-thaijo.org/index.php/spurhs/article/view/116251.