Harun, H.H.;                     Kasim, M.R.M.;                     Nurhidayu, S.;                     Ash’aari, Z.H.;                     Kusin, F.M.;                     Karim, M.K.A.    
        Association of Physicochemical Characteristics, Aggregate Indices, Major Ions, and Trace Elements in Developing Groundwater Quality Index (GWQI) in Agricultural Area. Int. J. Environ. Res. Public Health 2021, 18, 4562.
    https://doi.org/10.3390/ijerph18094562
    AMA Style
    
                                Harun HH,                                 Kasim MRM,                                 Nurhidayu S,                                 Ash’aari ZH,                                 Kusin FM,                                 Karim MKA.        
                Association of Physicochemical Characteristics, Aggregate Indices, Major Ions, and Trace Elements in Developing Groundwater Quality Index (GWQI) in Agricultural Area. International Journal of Environmental Research and Public Health. 2021; 18(9):4562.
        https://doi.org/10.3390/ijerph18094562
    
    Chicago/Turabian Style
    
                                Harun, Hazimah Haspi,                                 Mohamad Roslan Mohamad Kasim,                                 Siti Nurhidayu,                                 Zulfa Hanan Ash’aari,                                 Faradiella Mohd Kusin,                                 and Muhammad Khalis Abdul Karim.        
                2021. "Association of Physicochemical Characteristics, Aggregate Indices, Major Ions, and Trace Elements in Developing Groundwater Quality Index (GWQI) in Agricultural Area" International Journal of Environmental Research and Public Health 18, no. 9: 4562.
        https://doi.org/10.3390/ijerph18094562
    
    APA Style
    
                                Harun, H. H.,                                 Kasim, M. R. M.,                                 Nurhidayu, S.,                                 Ash’aari, Z. H.,                                 Kusin, F. M.,                                 & Karim, M. K. A.        
        
        (2021). Association of Physicochemical Characteristics, Aggregate Indices, Major Ions, and Trace Elements in Developing Groundwater Quality Index (GWQI) in Agricultural Area. International Journal of Environmental Research and Public Health, 18(9), 4562.
        https://doi.org/10.3390/ijerph18094562