Pankitwanitjalearn, Natrudee. 2020. “The Development of Self Learning Package on Distinguish of Similar Characters in Chinese for Nakhon Pathom Rajabhat University Chinese Language Major Student”. Journal of Sinology (วารสารจีนวิทยา) 14 (August):137-63. https://so16.tci-thaijo.org/index.php/JSINO/article/view/2951.