Somjit, Klaojai, Panate Pukrittayakamee, Pinyo Sriveerachai, Pratamaporn Chanthong, and Kamonporn Wannarit. “Validity and Reliability of the Thai Version of the Prolonged Grief Disorder-13-Revised Scale (Thai PG-13-R) in Bereaved Relatives”. Journal of the Psychiatric Association of Thailand 68, no. 1 (March 29, 2023). Accessed May 24, 2024. https://he01.tci-thaijo.org/index.php/JPAT/article/view/260022.