sankuan, thakoon. “Factors Affecting Receiving the COVID–19 vaccine in Children Aged 6 Months to 4 Years at the Service Area of Sukasem Community Health Center, Sakon Nakhon Hospital”. Journal of Sakon Nakhon Hospital, vol. 27, no. 1, Apr. 2024, pp. 1-15, https://he05.tci-thaijo.org/index.php/JSakonNakHosp/article/view/1292.