Hungyotha, Sarawuth, and Lertchai Charerntanyarak. 2024. “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 (3). Sakon Nakhon, Thailand:14-26. https://he05.tci-thaijo.org/index.php/JSakonNakHosp/article/view/1219.