โตหนึ่ง บ. “Improving Care for Elderly With Knee Pain at Pak Kut Wai Health Promotion Hospital, Mueng District, Ubon Ratchathani Province”. UBRU Journal for Public Health Research, vol. 6, no. 1, June 2017, pp. 27-36, https://he02.tci-thaijo.org/index.php/ubruphjou/article/view/162433.