นนทะเสน ป. “Guidelines for Conducting Research Projects under the Government Procurement and Supplies Management Act, B.E. 2560”. RBRU Journal of Humanities and Social Sciences (online), vol. 2, no. 1, July 2021, pp. 15-22, https://so05.tci-thaijo.org/index.php/husorbrujournal/article/view/248537.