Chen, Z.;                     Ma, Y.;                     Hua, J.;                     Wang, Y.;                     Guo, H.    
        Impacts from Economic Development and Environmental Factors on Life Expectancy: A Comparative Study Based on Data from Both Developed and Developing Countries from 2004 to 2016. Int. J. Environ. Res. Public Health 2021, 18, 8559.
    https://doi.org/10.3390/ijerph18168559
    AMA Style
    
                                Chen Z,                                 Ma Y,                                 Hua J,                                 Wang Y,                                 Guo H.        
                Impacts from Economic Development and Environmental Factors on Life Expectancy: A Comparative Study Based on Data from Both Developed and Developing Countries from 2004 to 2016. International Journal of Environmental Research and Public Health. 2021; 18(16):8559.
        https://doi.org/10.3390/ijerph18168559
    
    Chicago/Turabian Style
    
                                Chen, Zhiheng,                                 Yuting Ma,                                 Junyi Hua,                                 Yuanhong Wang,                                 and Hongpeng Guo.        
                2021. "Impacts from Economic Development and Environmental Factors on Life Expectancy: A Comparative Study Based on Data from Both Developed and Developing Countries from 2004 to 2016" International Journal of Environmental Research and Public Health 18, no. 16: 8559.
        https://doi.org/10.3390/ijerph18168559
    
    APA Style
    
                                Chen, Z.,                                 Ma, Y.,                                 Hua, J.,                                 Wang, Y.,                                 & Guo, H.        
        
        (2021). Impacts from Economic Development and Environmental Factors on Life Expectancy: A Comparative Study Based on Data from Both Developed and Developing Countries from 2004 to 2016. International Journal of Environmental Research and Public Health, 18(16), 8559.
        https://doi.org/10.3390/ijerph18168559