Kunzler, A.M.;                     Lindner, S.;                     Röthke, N.;                     Schäfer, S.K.;                     Metzendorf, M.-I.;                     Sachkova, A.;                     Müller-Eberstein, R.;                     Klinger, C.;                     Burns, J.;                     Coenen, M.;     
    et al.    Mental Health Impact of Early Stages of the COVID-19 Pandemic on Individuals with Pre-Existing Mental Disorders: A Systematic Review of Longitudinal Research. Int. J. Environ. Res. Public Health 2023, 20, 948.
    https://doi.org/10.3390/ijerph20020948
    AMA Style
    
                                Kunzler AM,                                 Lindner S,                                 Röthke N,                                 Schäfer SK,                                 Metzendorf M-I,                                 Sachkova A,                                 Müller-Eberstein R,                                 Klinger C,                                 Burns J,                                 Coenen M,         
        et al.        Mental Health Impact of Early Stages of the COVID-19 Pandemic on Individuals with Pre-Existing Mental Disorders: A Systematic Review of Longitudinal Research. International Journal of Environmental Research and Public Health. 2023; 20(2):948.
        https://doi.org/10.3390/ijerph20020948
    
    Chicago/Turabian Style
    
                                Kunzler, Angela M.,                                 Saskia Lindner,                                 Nikolaus Röthke,                                 Sarah K. Schäfer,                                 Maria-Inti Metzendorf,                                 Alexandra Sachkova,                                 Roxana Müller-Eberstein,                                 Carmen Klinger,                                 Jacob Burns,                                 Michaela Coenen,         
         and et al.        2023. "Mental Health Impact of Early Stages of the COVID-19 Pandemic on Individuals with Pre-Existing Mental Disorders: A Systematic Review of Longitudinal Research" International Journal of Environmental Research and Public Health 20, no. 2: 948.
        https://doi.org/10.3390/ijerph20020948
    
    APA Style
    
                                Kunzler, A. M.,                                 Lindner, S.,                                 Röthke, N.,                                 Schäfer, S. K.,                                 Metzendorf, M.-I.,                                 Sachkova, A.,                                 Müller-Eberstein, R.,                                 Klinger, C.,                                 Burns, J.,                                 Coenen, M.,                                 & Lieb, K.        
        
        (2023). Mental Health Impact of Early Stages of the COVID-19 Pandemic on Individuals with Pre-Existing Mental Disorders: A Systematic Review of Longitudinal Research. International Journal of Environmental Research and Public Health, 20(2), 948.
        https://doi.org/10.3390/ijerph20020948