Nudla, P., K. Balthip, and P. Pasri. “Perception of Purpose in Life among the Fourth-year Nursing Students”. Journal of Research in Nursing-Midwifery and Health Sciences, vol. 42, no. 1, Feb. 2022, pp. 1-10, https://he02.tci-thaijo.org/index.php/nur-psu/article/view/253449.