Muangpan, T., & Peaiamamporn, P. (2023). The Process Analysis in Purchasing 4.0: A Case Study of the Brass Strip Company. University of the Thai Chamber of Commerce Journal Humanities and Social Sciences, 43(3), 146–163. retrieved from https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/262801