บุญเชียง ว., and ทองดี จ. “Healthcare Service System for the Elderly and Thailand 4.0 Model”. Nursing Journal CMU, vol. 44, no. พิเศษ(1), Dec. 2017, pp. 138-50, https://he02.tci-thaijo.org/index.php/cmunursing/article/view/148058.