Punyapas, S., Pornnoppadol, C., Boon-yasidhi, V. and Likhitkiatikhachorn, P. 2015. Reliablity anf Validity of Weiss Functional Impairment Rating Scale (WFIRS)-Thai version in Children and Adolescents with Attention Deficit Hyperactivity Disorder. Journal of the Psychiatric Association of Thailand. 60, 2 (Sep. 2015), 111–126.