El-Khatib, Z.;                     Herrera, C.;                     Campello, G.;                     Mattfeld, E.;                     Maalouf, W.    
        The Role of Law Enforcement Officers/Police in Drug Prevention within Educational Settings—Study Protocol for the Development of a Guiding Document Based on Experts’ Opinions. Int. J. Environ. Res. Public Health 2021, 18, 2613.
    https://doi.org/10.3390/ijerph18052613
    AMA Style
    
                                El-Khatib Z,                                 Herrera C,                                 Campello G,                                 Mattfeld E,                                 Maalouf W.        
                The Role of Law Enforcement Officers/Police in Drug Prevention within Educational Settings—Study Protocol for the Development of a Guiding Document Based on Experts’ Opinions. International Journal of Environmental Research and Public Health. 2021; 18(5):2613.
        https://doi.org/10.3390/ijerph18052613
    
    Chicago/Turabian Style
    
                                El-Khatib, Ziad,                                 Celina Herrera,                                 Giovanna Campello,                                 Elizabeth Mattfeld,                                 and Wadih Maalouf.        
                2021. "The Role of Law Enforcement Officers/Police in Drug Prevention within Educational Settings—Study Protocol for the Development of a Guiding Document Based on Experts’ Opinions" International Journal of Environmental Research and Public Health 18, no. 5: 2613.
        https://doi.org/10.3390/ijerph18052613
    
    APA Style
    
                                El-Khatib, Z.,                                 Herrera, C.,                                 Campello, G.,                                 Mattfeld, E.,                                 & Maalouf, W.        
        
        (2021). The Role of Law Enforcement Officers/Police in Drug Prevention within Educational Settings—Study Protocol for the Development of a Guiding Document Based on Experts’ Opinions. International Journal of Environmental Research and Public Health, 18(5), 2613.
        https://doi.org/10.3390/ijerph18052613