สุวรรณไฉไล ส. (2019). Operational Efficiency of Electronic Government Procurement (e-GP) System: A Case Study of Office of The Narcotics Control Board. Journal of Humanities and Social Sciences, Rajapruk University, 5(1), 141–150. Retrieved from https://so03.tci-thaijo.org/index.php/rpu/article/view/191607