สิริภคมงคล ส. “Factors Affecting Knowledge and Preventive Behaviors of Influenza among the Clients in Nakhon Sawan Province”. Journal of Disease and Health Risk DPC.3, vol. 11, no. 2, Aug. 2019, pp. 49-60, https://he01.tci-thaijo.org/index.php/JDPC3/article/view/208929.