Luo, X.;                     Zhao, P.;                     Gong, X.;                     Zhang, L.;                     Tang, W.;                     Zou, X.;                     Chen, W.;                     Ling, L.    
        Concurrent Heroin Use and Correlates among Methadone Maintenance Treatment Clients: A 12-Month Follow-up Study in Guangdong Province, China. Int. J. Environ. Res. Public Health 2016, 13, 305.
    https://doi.org/10.3390/ijerph13030305
    AMA Style
    
                                Luo X,                                 Zhao P,                                 Gong X,                                 Zhang L,                                 Tang W,                                 Zou X,                                 Chen W,                                 Ling L.        
                Concurrent Heroin Use and Correlates among Methadone Maintenance Treatment Clients: A 12-Month Follow-up Study in Guangdong Province, China. International Journal of Environmental Research and Public Health. 2016; 13(3):305.
        https://doi.org/10.3390/ijerph13030305
    
    Chicago/Turabian Style
    
                                Luo, Xiaofeng,                                 Peizhen Zhao,                                 Xiao Gong,                                 Lei Zhang,                                 Weiming Tang,                                 Xia Zou,                                 Wen Chen,                                 and Li Ling.        
                2016. "Concurrent Heroin Use and Correlates among Methadone Maintenance Treatment Clients: A 12-Month Follow-up Study in Guangdong Province, China" International Journal of Environmental Research and Public Health 13, no. 3: 305.
        https://doi.org/10.3390/ijerph13030305
    
    APA Style
    
                                Luo, X.,                                 Zhao, P.,                                 Gong, X.,                                 Zhang, L.,                                 Tang, W.,                                 Zou, X.,                                 Chen, W.,                                 & Ling, L.        
        
        (2016). Concurrent Heroin Use and Correlates among Methadone Maintenance Treatment Clients: A 12-Month Follow-up Study in Guangdong Province, China. International Journal of Environmental Research and Public Health, 13(3), 305.
        https://doi.org/10.3390/ijerph13030305