Ashton, J. (2021). COVID-21: Just when you thought it was safe to go back in the water. J R Soc Med.
Citação norma ChicagoAshton, John. "COVID-21: Just When You Thought It Was Safe to Go Back in the Water." J R Soc Med 2021.
MLA引文Ashton, John. "COVID-21: Just When You Thought It Was Safe to Go Back in the Water." J R Soc Med 2021.
警告：這些引文格式不一定是100％准確.