Hayden, M.C.;                     Limbach, M.;                     Schuler, M.;                     Merkl, S.;                     Schwarzl, G.;                     Jakab, K.;                     Nowak, D.;                     Schultz, K.    
        Effectiveness of a Three-Week Inpatient Pulmonary Rehabilitation Program for Patients after COVID-19: A Prospective Observational Study. Int. J. Environ. Res. Public Health 2021, 18, 9001.
    https://doi.org/10.3390/ijerph18179001
    AMA Style
    
                                Hayden MC,                                 Limbach M,                                 Schuler M,                                 Merkl S,                                 Schwarzl G,                                 Jakab K,                                 Nowak D,                                 Schultz K.        
                Effectiveness of a Three-Week Inpatient Pulmonary Rehabilitation Program for Patients after COVID-19: A Prospective Observational Study. International Journal of Environmental Research and Public Health. 2021; 18(17):9001.
        https://doi.org/10.3390/ijerph18179001
    
    Chicago/Turabian Style
    
                                Hayden, Markus C.,                                 Matthias Limbach,                                 Michael Schuler,                                 Steffen Merkl,                                 Gabriele Schwarzl,                                 Katalin Jakab,                                 Dennis Nowak,                                 and Konrad Schultz.        
                2021. "Effectiveness of a Three-Week Inpatient Pulmonary Rehabilitation Program for Patients after COVID-19: A Prospective Observational Study" International Journal of Environmental Research and Public Health 18, no. 17: 9001.
        https://doi.org/10.3390/ijerph18179001
    
    APA Style
    
                                Hayden, M. C.,                                 Limbach, M.,                                 Schuler, M.,                                 Merkl, S.,                                 Schwarzl, G.,                                 Jakab, K.,                                 Nowak, D.,                                 & Schultz, K.        
        
        (2021). Effectiveness of a Three-Week Inpatient Pulmonary Rehabilitation Program for Patients after COVID-19: A Prospective Observational Study. International Journal of Environmental Research and Public Health, 18(17), 9001.
        https://doi.org/10.3390/ijerph18179001