Somchit, Saisuda. “An Analysis of Optimum Number of Employee of Kasetsart University Saving Co-operatives Society Limited”. Kasetsart Journal of Social Sciences 7, no. 1 (January 1, 1986): 62–65. accessed September 11, 2026. https://so04.tci-thaijo.org/index.php/kjss/article/view/243756.