Kotchasap, P. “MOTIVATION OF THE ELDERLY TOWARDS MEDICAL TOURISM IN SUPHANBURI PROVINCE”. Phranakhon Rajabhat Research Journal : Humanities and Social Sciences, vol. 17, no. 1, June 2022, pp. 185-96, https://so05.tci-thaijo.org/index.php/PNRU_JHSS/article/view/255014.