Lach, S., Payanun, K., Intaratat, K. and Sombunsooke, B. (2002) “Roles of Agricultural Extension Policymakers in Agricultural Development of Cambodia”, Kasetsart Journal of Social Sciences, 23(2), pp. 167–184. available at: https://so04.tci-thaijo.org/index.php/kjss/article/view/243416 (accessed: 13 September 2026).