Suksing, Uthai, Santi Kreankard, and Witool Promme. “Cost Estimation for Engineering Work by Co-operation of Visual Basic, Auto CAD and Microsoft Excel”. Engineering and Applied Science Research 29, no. 1-2 (February 28, 2013): 49–63. accessed August 31, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/6524.