Andreou, E.;                     Alexopoulos, E.C.;                     Lionis, C.;                     Varvogli, L.;                     Gnardellis, C.;                     Chrousos, G.P.;                     Darviri, C.    
        Perceived Stress Scale: Reliability and Validity Study in Greece. Int. J. Environ. Res. Public Health 2011, 8, 3287-3298.
    https://doi.org/10.3390/ijerph8083287
    AMA Style
    
                                Andreou E,                                 Alexopoulos EC,                                 Lionis C,                                 Varvogli L,                                 Gnardellis C,                                 Chrousos GP,                                 Darviri C.        
                Perceived Stress Scale: Reliability and Validity Study in Greece. International Journal of Environmental Research and Public Health. 2011; 8(8):3287-3298.
        https://doi.org/10.3390/ijerph8083287
    
    Chicago/Turabian Style
    
                                Andreou, Eleni,                                 Evangelos C. Alexopoulos,                                 Christos Lionis,                                 Liza Varvogli,                                 Charalambos Gnardellis,                                 George P. Chrousos,                                 and Christina Darviri.        
                2011. "Perceived Stress Scale: Reliability and Validity Study in Greece" International Journal of Environmental Research and Public Health 8, no. 8: 3287-3298.
        https://doi.org/10.3390/ijerph8083287
    
    APA Style
    
                                Andreou, E.,                                 Alexopoulos, E. C.,                                 Lionis, C.,                                 Varvogli, L.,                                 Gnardellis, C.,                                 Chrousos, G. P.,                                 & Darviri, C.        
        
        (2011). Perceived Stress Scale: Reliability and Validity Study in Greece. International Journal of Environmental Research and Public Health, 8(8), 3287-3298.
        https://doi.org/10.3390/ijerph8083287