Na Lumphun S, Thongsookdee R, Leosiripong P, Vittayakorn S. Enhancing self-confidence of the student with multiple disabilities using group process. J Ratchasuda [internet]. 2022 Jun. 13 [cited 2026 Sep. 28];18(1):108-24. available from: https://so03.tci-thaijo.org/index.php/RSjournal/article/view/261674