Liu, Yue, Yupin Chanroeng, and Patiphan Uthayanukul. 2021. “The Construction of Pronunciation Improvement Exercises Book on Final Consonant with Mae Kom, Mae Kok, Mae Kod and Mae Kob for Chinese Students Speaking Thai as a Second Language at Chiang Rai Rajabhat University”. Ganesha Journal 17 (1):107-21. https://so01.tci-thaijo.org/index.php/pikanasan/article/view/243083.