Panngam, C. ., T. . Aramruang, and W. . Inwanna. “Food sanitation studies of food stalls Pho Sadet Subdistrict Market Area Muang District, Nakhon Si Thammarat Province”. Chalermkarnchana Academic Journal, vol. 9, no. 1, Jan. 2022, https://so19.tci-thaijo.org/index.php/cnujournal/article/view/186.