Pasatung, Emorn, and Ganjana Nathapindhu. “Bacterial Contamination of Public Telephone Receivers in a Hospital”. Srinagarind Medical Journal 22, no. 4 (November 11, 2013): 443–448. Accessed February 6, 2023. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13195.