Vidyasagara, N.M.W. “A Comprehensive Approach to Purchasing Technology Part I: Development of the Approach”. Science & Technology Asia 2, no. 1 (November 6, 2015): 68–78. Accessed May 4, 2024. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/42031.