Huang, Y.-T.;                     Chen, C.-C.;                     Ho, Y.-N.;                     Tsai, M.-T.;                     Tsai, C.-M.;                     Chuang, P.-C.;                     Cheng, F.-J.    
        Short-Term Effects of Particulate Matter and Its Constituents on Emergency Room Visits for Chronic Obstructive Pulmonary Disease: A Time-Stratified Case-Crossover Study in an Urban Area. Int. J. Environ. Res. Public Health 2021, 18, 4400.
    https://doi.org/10.3390/ijerph18094400
    AMA Style
    
                                Huang Y-T,                                 Chen C-C,                                 Ho Y-N,                                 Tsai M-T,                                 Tsai C-M,                                 Chuang P-C,                                 Cheng F-J.        
                Short-Term Effects of Particulate Matter and Its Constituents on Emergency Room Visits for Chronic Obstructive Pulmonary Disease: A Time-Stratified Case-Crossover Study in an Urban Area. International Journal of Environmental Research and Public Health. 2021; 18(9):4400.
        https://doi.org/10.3390/ijerph18094400
    
    Chicago/Turabian Style
    
                                Huang, Yii-Ting,                                 Chien-Chih Chen,                                 Yu-Ni Ho,                                 Ming-Ta Tsai,                                 Chih-Min Tsai,                                 Po-Chun Chuang,                                 and Fu-Jen Cheng.        
                2021. "Short-Term Effects of Particulate Matter and Its Constituents on Emergency Room Visits for Chronic Obstructive Pulmonary Disease: A Time-Stratified Case-Crossover Study in an Urban Area" International Journal of Environmental Research and Public Health 18, no. 9: 4400.
        https://doi.org/10.3390/ijerph18094400
    
    APA Style
    
                                Huang, Y.-T.,                                 Chen, C.-C.,                                 Ho, Y.-N.,                                 Tsai, M.-T.,                                 Tsai, C.-M.,                                 Chuang, P.-C.,                                 & Cheng, F.-J.        
        
        (2021). Short-Term Effects of Particulate Matter and Its Constituents on Emergency Room Visits for Chronic Obstructive Pulmonary Disease: A Time-Stratified Case-Crossover Study in an Urban Area. International Journal of Environmental Research and Public Health, 18(9), 4400.
        https://doi.org/10.3390/ijerph18094400