?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Arifin&rft.aufirst=helmi&rft.au=Arifin%2C+helmi&rft.inst=UNIVERSITAS+ANDALAS&rft.degree=Masters&rft.date=2013&rft.title=Tesis+Nurhasnah