มาอยู่ข. (2019) “Comparative study on interrogative usage of Chinese and Thai interrogative pronoun “SHENME” and ‘A-RAI’”, Journal of Roi Et Rajabhat University, 13(1), pp. 241-251. Available at: https://www.tci-thaijo.org/index.php/reru/article/view/186062 (Accessed: 22October2019).