คำอั่น เสรี, and จิรโชติเดโช กิรณา. 2019. “The Effects of STAD-Based Constructivist Learning Approach on Mathematics Learning Achievement”. Journal of Education Studies 47 (Suppl. 2). Bangkok, Thailand:328-45. https://so02.tci-thaijo.org/index.php/EDUCU/article/view/232630.