Thaneerat, T., Y. Panitangkool, T. Doungyota, U. Tooreerach, and P. Kimsao. “Prevalence of Depression, Anxiety, and Associated Factors in Caregivers of Geriatric Psychiatric Patients”. Journal of the Psychiatric Association of Thailand, vol. 61, no. 4, Dec. 2016, pp. 319-30, https://he01.tci-thaijo.org/index.php/JPAT/article/view/73609.