Khamkhom, N. ., and P. Visuttipun. “Social Engagement among Thai Older Persons with Visual or Hearing Impairment”. Journal Of Ratchasuda Institute for Research and Development of Persons With Disabilities, vol. 19, no. 1, June 2023, pp. 1-20, https://so03.tci-thaijo.org/index.php/RSjournal/article/view/264488.