Phanwattana, P. (2024) “Direct, Indirect, and Total Influences of 5 Principles for Affecting the Performance of Police Officer in Metropolitan Police 4”, Doctor of Philosophy in Social Sciences Journal, 3(1), pp. 48–64. available at: https://so08.tci-thaijo.org/index.php/dpssj/article/view/2966 (accessed: 3 October 2026).