?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=BURHANUDIN+ARIF+NURNUGROHO+-+NIM.+05610001%2C+&rft.aulast=BURHANUDIN+ARIF+NURNUGROHO+-++NIM.+05610001&rft.aufirst=+&rft.degree=Skripsi&rft.date=20+January+2010&rft.title=KONSEP+DASAR+RING+BERNORMA&rft.inst=UIN+Sunan+Kalijaga+Yogyakarta