Chaiyawan, H., and L. Charerntanyarak. “Knowledge and Prevention Behavior of Ischemic Heart Disease Among Elders in Sikhiu District, Nakhonratchasima Province”. Journal of Health Science of Thailand, vol. 24, no. 6, Nov. 2017, pp. 1051-9, https://thaidj.org/index.php/JHS/article/view/558.