Gao, H.;                     Wang, K.;                     W. Au, W.;                     Zhao, W.;                     Xia, Z.-l.    
        A Systematic Review and Meta-Analysis of Short-Term Ambient Ozone Exposure and COPD Hospitalizations. Int. J. Environ. Res. Public Health 2020, 17, 2130.
    https://doi.org/10.3390/ijerph17062130
    AMA Style
    
                                Gao H,                                 Wang K,                                 W. Au W,                                 Zhao W,                                 Xia Z-l.        
                A Systematic Review and Meta-Analysis of Short-Term Ambient Ozone Exposure and COPD Hospitalizations. International Journal of Environmental Research and Public Health. 2020; 17(6):2130.
        https://doi.org/10.3390/ijerph17062130
    
    Chicago/Turabian Style
    
                                Gao, Hui,                                 Kan Wang,                                 William W. Au,                                 Wensui Zhao,                                 and Zhao-lin Xia.        
                2020. "A Systematic Review and Meta-Analysis of Short-Term Ambient Ozone Exposure and COPD Hospitalizations" International Journal of Environmental Research and Public Health 17, no. 6: 2130.
        https://doi.org/10.3390/ijerph17062130
    
    APA Style
    
                                Gao, H.,                                 Wang, K.,                                 W. Au, W.,                                 Zhao, W.,                                 & Xia, Z.-l.        
        
        (2020). A Systematic Review and Meta-Analysis of Short-Term Ambient Ozone Exposure and COPD Hospitalizations. International Journal of Environmental Research and Public Health, 17(6), 2130.
        https://doi.org/10.3390/ijerph17062130