หลวงสุรินทร์ โ. “EMPLOYEE PARTICIPATION IN THE MANAGEMENT OF KUMPHAWAPI SUGAR FACTORY UDON THANI PROVINCE”. Academic Journal Phranakhon Rajabhat University, vol. 11, no. 2, Oct. 2020, https://so01.tci-thaijo.org/index.php/AJPU/article/view/237964.