Phansuma, Daranchanok, and Pongsit Boonruksa. 2021. “Knowledge, Attitudes, and Preventive Behaviors of COVID-19 Among Residents in Pru Yai Sub-District, Muang District, Nakhon Ratchasima Province”. Srinagarind Medical Journal 36 (5):597-604. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/252568.