Dyfyniad APA

Liu, F., Wang, M., & Zheng, M. (2021). Effects of COVID-19 lockdown on global air quality and health. Sci Total Environ.

Dyfyniad Arddull Chicago

Liu, Feng, Meichang Wang, and Meina Zheng. "Effects of COVID-19 Lockdown On Global Air Quality and Health." Sci Total Environ 2021.

Dyfyniad MLA

Liu, Feng, Meichang Wang, and Meina Zheng. "Effects of COVID-19 Lockdown On Global Air Quality and Health." Sci Total Environ 2021.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.