Silarak, Suphasorn. 2018. “Enhance Life Skills, Hygiene and Sanitation of Children with Mental Retardation Special Education Faculty of Education, Rajabhat MahaSarakham University”. Journal for Developing the Social and Community 5 (1). Bangkok, Thailand:195-206. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/210525.