อุปัชฌาย์ เ. (2021) “DEVELOPMENT OFFICERS: THE PROCESS OF BECOMING AN ARMY DEVELOPMENT AGENT”, CRMA Journal of Humanities and Social Sciences. Nakhon Nayok, Thailand, 8, pp. 79–94. available at: https://so01.tci-thaijo.org/index.php/CRMA_HUSO/article/view/247340 (accessed: 7 October 2026).