 DOI :
            
            https://doi.org/10.24114/jpkm.v22i4.5735
 DOI :
            
            https://doi.org/10.24114/jpkm.v22i4.5735
             DOI :
            
            https://doi.org/10.24114/jpkm.v22i4.5756
 DOI :
            
            https://doi.org/10.24114/jpkm.v22i4.5756
             DOI :
            
            https://doi.org/10.24114/jpkm.v22i4.5757
 DOI :
            
            https://doi.org/10.24114/jpkm.v22i4.5757
             DOI :
            
            https://doi.org/10.24114/jpkm.v22i4.5758
 DOI :
            
            https://doi.org/10.24114/jpkm.v22i4.5758
            