Pornrattananukul, Apisara, Minwen Zhu, and Jianqin Wang. 2011. “Effects of the Similarity in Categorization of Chinese and Thai Tones on Chinese Tone Perception by Thai Learners”. Journal of Sinology (วารสารจีนวิทยา) 5 (August):171-90. https://so16.tci-thaijo.org/index.php/JSINO/article/view/2800.