Chanchaem R, Montientong D, Puanfai S. 2018. “Prevalence of Neuropsychiatric Symptoms in Patients With Dementia; A Study in Chiangmai Neurological Hospital”. Journal of The Department of Medical Services 43 (6):96-100. https://he02.tci-thaijo.org/index.php/JDMS/article/view/247689.