Poonthawe, Patcharin, Suwanna Junprasert, Chanandchidadussadee Toonsiri, Somsamai Rattanagreethakul, Sakorn Intolo, and Trakulwong Luecha. 2023. “Factors Influencing COVID-19 Preventive Behavior among Older Adults in Eastern Thailand”. NU Journal of Nursing and Health Sciences 18 (1):36-52. https://he01.tci-thaijo.org/index.php/NurseNu/article/view/263093.