Wichai, T., and R. Nguanjairak. “Health Literacy and Factors Associated with Health Service Access Among Elderly People in Nakhon Ratchasima Province”. Thai Journal of Health Education, vol. 46, no. 2, Dec. 2023, pp. 165-77, https://he01.tci-thaijo.org/index.php/muhed/article/view/264638.