Harncharoenkit, P., S. Lirtmunlikaporn, and W. Tuanrat. “Knowledge and Practices for Influenza Prevention Among Elderly in Communities”. Nursing Journal CMU, vol. 49, no. 1, Mar. 2022, pp. 175-8, https://he02.tci-thaijo.org/index.php/cmunursing/article/view/254411.