Suriya , J., S. Aungwattana, and S. Suankaew. “Social support and health behavior of the elderly of the elderly club of Sungmen District, Phrae Province”. Nursing Journal CMU, vol. 47, no. 3, Sept. 2020, pp. 267-76, https://he02.tci-thaijo.org/index.php/cmunursing/article/view/245770.