Maolee, P., and S. Janopat. “Relationships Between Proactive Professionalism Supply Management and Procurement Effectiveness of Higher Education Institutions in Thailand”. Rajapark Journal, vol. 16, no. 49, Dec. 2022, pp. 57-70, https://so05.tci-thaijo.org/index.php/RJPJ/article/view/258508.