Onmek, Nutthajit, Kosin Prabnarong, Thichada Phuangwan, and Sasanee Srithai. “Concentration of microbe in surfaces of hospital ambulances”. UBRU Journal for Public Health Research 8, no. 1 (August 26, 2019): 28–38. accessed September 24, 2026. https://he02.tci-thaijo.org/index.php/ubruphjou/article/view/211516.