Laotrakunchai , K., Y. . Laotrakunchai, and K. Chuwicharoenkit. “The Backwash Effect of the New HSK Level 4 Test on High School Students in Thailand”. Journal of Sinology, vol. 15, no. 1, Jan. 2021, https://journal.mfu.ac.th/index.php/jsino/article/view/13.