Tullapong, S., Juntasopeepun, P., & Jintanawat, R. (2024). Factors Predicting COVID-19 Vaccination Intention of Unvaccinated Older Adults in Phetchabun Province. Nursing Journal CMU, 51(4), 119–132. retrieved from https://he02.tci-thaijo.org/index.php/cmunursing/article/view/265496