Pangsakunyanon, W. ., Yupas, Y. and Kenaphoom, S. . (2022) “Performance Efficiency Development of Policeman in Provincial Police Region 4”, Journal of Research and Development Institute Rajabhat Maha Sarakham University, 9(3), pp. 573–590. Available at: https://so03.tci-thaijo.org/index.php/rdirmu/article/view/256429 (Accessed: 30 April 2024).