?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=YULIANA&rft.aulast=NUR&rft.au=NUR%2C+YULIANA&rft.degree=S1&rft.inst=UNY&rft.date=27+July+2010&rft.title=EFEKTIVITAS+PEMBELAJARAN+KONSEP+PECAHAN+PADA+SISWA+KELAS+III+SD+MENGGUNAKAN+PERMAINAN+KERTAS+LIPAT+DAN+PUZZLE