Ramrit, S., W. Kumban, O. Keeratisiroj, and W. Siritaratiwat. “Reliability of the Gross Motor Function Classification System-Expanded and Revised in Children With Cerebral Palsy Aged Less Than 6 Years by Physical Therapy Students”. Archives of Allied Health Sciences, vol. 29, no. 3, Mar. 2018, pp. 298-06, https://he01.tci-thaijo.org/index.php/ams/article/view/116072.