Thiamwong, L., Maneesriwongul, W., Malathum, P., Jitapunkul, S., Vorapongsathorn, T., & Stewart, A. L. (2013). Development and Psychometric Testing of the Healthy Aging Instrument. Pacific Rim International Journal of Nursing Research, 12(4), 285–296. Retrieved from https://he02.tci-thaijo.org/index.php/PRIJNR/article/view/5866