Hungyotha, Sarawuth, and Lertchai Charerntanyarak. “Factors Related to Covid–19 Vaccination among 608 Group in Napho Subdistrict, Kusuman District, Sakon Nakhon Province: a Retrospective Study”. Journal of Sakon Nakhon Hospital 26, no. 3 (January 18, 2024): 14–26. accessed April 5, 2025. https://he05.tci-thaijo.org/index.php/JSakonNakHosp/article/view/1219.