Yengthoon, Fatin, Raksina Yodyoi, and Pannarong Titipornwanich. 2026. “Developing Thai Consonant Pronunciation Skills Using Small Books for Children with Intellectual Disabilities in Prathomsuksa 1”. Suan Dusit Graduate School Academic Journal 22 (1). Bankok, Thailand:53-65. https://so19.tci-thaijo.org/index.php/SDUGSAJ/article/view/1327.