Namprasertkul, U., and D. La-ornual. “Influence of Internal Versus External References on Individuals’ Satisfaction With Academic and Professional Performance Evaluations”. Journal of Population and Social Studies [JPSS], vol. 24, no. 1, Jan. 2016, pp. 1-12, https://so03.tci-thaijo.org/index.php/jpss/article/view/102398.