Jantra, Naiyanaporn, and Tongtip Salawongluk. 2023. “Factors Related to Quality of Life of Elderly in Khok- Kruat Sub-District, Mueang Nakhon Ratchasima District, Nakhon Ratchasima Province Administration Organization”. Journal of Vongchavalitkul university 36 (1):50-66. https://ph01.tci-thaijo.org/index.php/vujournal/article/view/253094.