สุขชื่น ณ. Concepts and Theories Relating to Interlanguage Pragmatics: Speech Act of Apologies. rpujournal [internet]. 2016 May 31 [cited 2026 Jan. 8];2(1):10-23. available from: https://so03.tci-thaijo.org/index.php/rpu/article/view/112381