เพชรคง พ., ชูรินทร์ พ., & คงรุ่งโชค อ. (2017). The Relationship between Operating Factors and Expenditure of Manufacturing Business in Small and Medium Enterprises (SMEs) in Surat Thani Province. Journal of Management Sciences Suratthani Rajabhat University, 4(2), 117–142. Retrieved from https://so03.tci-thaijo.org/index.php/msj/article/view/116369