สุวรรณไฉไล สุภาภรณ์. “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, no. 1 (May 29, 2019): 141–150. Accessed April 20, 2024. https://so03.tci-thaijo.org/index.php/rpu/article/view/191607.