Boonmak, Polpun, Suhattaya Boonmak, Thaponawong Mitsungnern, and Fa-ngam Chareonpol. 2014. “Comparison Study Between Face Shield and Pocket Mask for Adult Basic Life Support Training for Health Care Provider”. Srinagarind Medical Journal 29 (2):121-26. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/18261.