Chamsuwanwong, Nattanit. “Analysis of Interrogative Sentence as Indirect Speech Act in Mandarin and Thai”. Journal of Sinology (วารสารจีนวิทยา) 3 (August 1, 2009): 74–97. accessed December 3, 2025. https://so16.tci-thaijo.org/index.php/JSINO/article/view/2751.