Firmansyah, N.A., Wicaksono, A. and Anwar, M.R. 2021. Health Protocol in Penataran Train during the COVID-19 Pandemic. Civil and Environmental Science Journal (CIVENSE). 4, 2 (Jul. 2021), 163–172. DOI:https://doi.org/10.21776/ub.civense.2021.00402.6.