S. Punyapas, C. Pornnoppadol, V. Boon-yasidhi, and P. Likhitkiatikhachorn, “Reliablity anf Validity of Weiss Functional Impairment Rating Scale (WFIRS)-Thai version in Children and Adolescents with Attention Deficit Hyperactivity Disorder”., J Psychiatr Assoc Thailand, vol. 60, no. 2, pp. 111–126, Sep. 2015.