Chaidet, Ekkachai. 2023. “The Development of a Food Sanitation Operation Manual ‘Food Establishment’ for Ministerial Regulation Hygiene for Food Establishment B.E. 2561 (A.D. 2018)”. RPU Journal of Business Administration 2 (2):109-31. https://so03.tci-thaijo.org/index.php/RPUBAJOURNAL/article/view/274049.