Na Lumphun, S., Thongsookdee , R., Leosiripong , P., & Vittayakorn, S. (2022). Enhancing self-confidence of the student with multiple disabilities using group process. Journal Of Ratchasuda Institute for Research and Development of Persons With Disabilities, 18(1), 108–124. retrieved from https://so03.tci-thaijo.org/index.php/RSjournal/article/view/261674