มุมมาลา น้ำทิพย์, and เสาแก้ว สุรศักดิ์. “STUDY OF THE SITUATION ON LOCAL ORDINANCE FOR AUTOMATIC WATER VENDING MACHINE QUALITY PROVISION IN PHETCHABUN PROVINCE”. Thai Food and Drug Journal 25, no. 3 (October 11, 2022): 64–74. Accessed May 5, 2024. https://he01.tci-thaijo.org/index.php/fdajournal/article/view/259247.