Boonyamalik, P., S. Suksawang, S. Swangwongsin, C. Chaichanachimplee, and K. Narakornpijit. “Development of the Psychological Impact Scale for Crisis Events - 18 (PISCES-18)”. Journal of the Psychiatric Association of Thailand, vol. 54, no. 3, Apr. 2013, pp. 317-26, https://he01.tci-thaijo.org/index.php/JPAT/article/view/7677.